The TI-99/8 looks like it would have been awesome. It solved the issues of the 99/4a, had improved basic and pascal built in, all while being backward compatible.
I currently have hopes / am watching Apostrophy who are building on top of Graphene but at least they acknowledge that people need Google Play and are attempting to support that while not sacrificing the entire device to privacy issues. https://www.apostrophy.ch
Saved my allowance to buy a TI-86 graphing calculator a year before I would need it in school just so I could program in class. A Z80 @ 4mhz, it provided so many skills early on with effiency. Good times.
EDIT: Oh, and back before there were any online resources. You got the manual and thats it.