The download/installation process on my RPi was very reasonable. I think the whole process took no more than 5 minutes.
I do have a few questions, though.
1. The installation put the app start shortcut for the Wolfram Engine in the Education and Programming folders. Should there be an app start shortcut for Mathematica as well? There is none for Mathematica on my RPi. Starting from the command line works fine, though.
2. When I open an existing notebook from the initial blank notebook, the window system positions the menu bar of the newly opened notebook off the top of my display in the upper left corner. This also happens when I open a notebook from the File Manager. I've done nothing to modify the configuration of how this should happen. I can't get my mouse on top of the menu bar to reposition the window. In order to get access to the menu bar, I have to use Alt-Space to open the window control drop-down that has the Move option. Has anyone else seen this?
Overall, I'm very impressed with how well Wolfram runs on the RPi.