That's long gone. There's no such tools (that I'm aware of) in the mainstream for smartphones or even computers. You say two things: "they support so much more than TI-basic", well yes and that's the problem. They are developer's tools, not user-programmer tools. If you want to write a quick program to help you in some task you don't have a quick BASIC-like tool to do that. And you also say "a feature that appeals only to a tiny subset of the market", again a self-fulfilling prophecy. There are no tools for non-technical users to program their devices, so only a minority of users do want to program their devices (or even realise that they can do so!)