Most of what I learned about the Wolfram Language was through online courses offered at Wolfram-U, a number of books, the Community and StackExchange and the many webinars Wolfram offers. Recently, I completed the Daily Study Group: A Guide to Programming and Mathematics with the Wolfram Language. The certification experience helped me structure and fill in gaps in my knowledge and ask questions about topics I was still struggling with. In addition, the certification process helped me better gauge my proficiency level. I appreciated the structure of the quizzes; the first two were meant to verify my basic understanding of WL concepts and the third required me to code a solution for a specific problem.

I recommend a separate post on the second question as there are many aspects to it. This is my personal perspective on your second question. During my studies at university, Mathematica was already a well-established platform for computational Algebra, and I think it still is for many academic careers. Outside academia, many employers still require established and popular languages, platforms and methods. Functional programming is catching up, so time will tell. However, I am sure the WL as a computational toolbox will help many of us in their jobs to do things faster, better or in more flexible ways. I am thinking of independent consultants and researchers, freelancers, small firms, but I am also aware that Financial Research Dept. and firms are using it too.

The process of certification employed in the Daily Study group was user-friendly enough. I miss a number of aspects though: one is an indication of course load / credits. The other one is a page (maybe in your personal profile page) with an overview of courses completed with dates, workload/credits, certificates and scores. The Daily Study Group Quizzes were automatically graded, and submitted to Wolfram-U, but there is no feedback in the process which led to many questions whether or not the results were received and to additional work for the Wolfram-U staff, I am sure. It would have been beneficial if the results were confirmed and summarized once received by Wolfram-U.

Certifications on the Community pages may encourage others to get certifications as well. I would use it on my Community Profile. On LinkedIn it may be a good option for some people, depending on where they are and where they want to go in their career.

Thank you for your feedback, which I've shared with our instructors. I'm glad you found the experience to be helpful. I also want to share an updated link to the Wolfram U catalog. We have added filtering functionality to the catalog, so you can search by keywords, topic areas, course titles, and more. This link takes you to results showing all available certifications: Wolfram U catalog search by certifications

Recently, I completed Hands-on Start to Wolfram Mathematica with the Wolfram Language. The certification experience helped me refresh and fill in the gaps in my knowledge. In addition, the presentation process of the module is too detailed even for someone who is just starting out.

I participated in the 14-hour Wolfram Language Study Group led earlier in 2023 by Arben and the subsequent Level 1 certification study -- led by Arben and Abrita. Excellent stuff, and excellent staff -- from the TPMs to the question-answerers to the lead instructors. Arben certainly went beyond the call with the range and depth he engaged in questions in the classes and the community discussion. He had great knowledge and a wonderful sense of fun. I was left in awe that instruction of this high quality was freely available on something that I wanted to learn. I'm starting work on a Wolfram Notebook to portray the interesting physics and physiology of RMT Ropes. The first thing I've done is to create a ParametricPlot3D approximating the helical path of the rope's midline. I wasn't really concentrating on higher math during the course, but I realized with one of Arben's examples that a parametric plot was the perfect tool for plotting a 3D path of the rope's oscillating movement in three planes. I know I've seen that stuff many years ago, but I remember it was never #!$$ fun before. I need to make it pretty and expand to show what's happening anatomically to drive that interesting rope-movement; the Wolfram anatomy Entities should be perfect for showing the musculoskeletal dynamics.

WRT Dave's 4-level "Did you like?"/"What did you learn?"/"Master?"/"Apply?", I thought of an extended metaphor to the parable of the blind persons and the elephant. Attending a course allows one to touch the elephant -- hopefully touching many different parts of the elephant. Completing a course [with quizzes] gives you a decent picture of what the elephant as a whole looks like. Passing the L1 certification means you can make the elephant do something real -- something everyone would agree is an elephant-task. The L2 certification means you have harnessed the elephant to impact something in the real world: plow a field, carry supplies for an expedition, dance the tango, etc.. Part of why the metaphor works for me is that the Wolfram tools really are vast, they look vastly different from different perspectives, and a superior overall strategy to learning is to engage with a whole bunch of 'em. Feel free to steal that metaphor; it may work better with drawings.

WRT feedback, the largest issue I found is with communication:

1. There are a bunch of different ways for students to communicate with Wolfram-U staff. It's a bit confusing, and some questions never get a response. Based on my experience, there is never anyone who looks at questions asked in the "ask a question" button when replaying a video in BigMarker. That is not a significant problem in and of itself, but it's noteworthy that nobody says to not send questions that way or asks BigMarker to disable that feature in playback windows for Wolfram.

2. The community.wolfram.com forums have some positively squirrelly behaviors. When I clicked to start entering text here today, the system sent me to another browser window. I think this is related to not having my login cookie available in the first window, but I don't really know. I fixed by reloading this window. Such unexpected hyperspace jumps in the messaging system are jarring -- especially to newbie (or long-absent) users who need to learn everything about everything. Having the software tell you what it needs in a human way rather than redirect you should be a high priority. The chat system should be as close to friction-free for newbies; this one is high friction.

3. The chat system does not scale (and I know that staff at Wolfram Research know exactly what that means). Our Wolfram Language Basics WSG has over 150 messages. I found navigating in a forum with that many messages problematic. I never have found a way to efficiently find new messages. When I got an e-mail notification of a reply to a message, clicking on the link in e-mail would not deliver me to the correct place in the discussion. Being able to effortlessly jump to new messages seems is one of the most important functions of chat software; many widely-available systems do it far better than this one. OTOH, it does work pretty well when there are 5-6 fairly short messages on one topic.

4. With most of the Wolfram Language, one has the sense of an incredibly well-designed interoperable system. Understanding well how one thing works helps you understand how all of it works, and it all works together quite well. I don't get that sense with the chat software. It doesn't feel like part of the Wolfram system; it feels like orphaned software. Other chat systems like Discourse are far more responsive and have a [platform-specific] client app module available on All the Right Platforms (e.g., Mac, iPhone, iPad, Linux, Windows, Linux, Raspberry Pi). (AFAICT) there is not a URL for each message in a particular discussion. Wolfram Research doesn't make an e-mail system, or a browser, or video streaming software. Those things are better done by companies that exist to offer those solutions. IMHO, I think Wolfram's users -- especially the newbies -- would be better off if they would port to a modern chat system and they would stop using their chat subsystem.

5. Is questioning the W chat system a third-rail topic? I have made several long comments about it here and elsewhere, but I've never gotten anything but a cursory response. If someone has created the definitive writeup on why Wolfram must stay with their own chat software, I'd like to see it. As the head of Wolfram-U, I think the use of a less-than-optimal chat system affects your department -- your customers -- more than anyone else.