Thanks. I had seen the list (examples/StepByStepSolutions), but had taken it as non-comprehensive ("a few examples of ..."), whereas your phrase "availability type list" sounds comprehensive. Those blog posts definitely help establish the dynamic nature of their applicability.

I guess my contention is that if Wolfram is selling a product, there ought to be somewhere where a customer can find a reasonable guide of when they can expect to be able to use it. If that list is comprehensive, then it fulfills that (though it should be labeled as such).