Also any app-specific bindings would I guess require some hooking (input interception / injection) at the software level.

Now there's an interesting challenge. A ROM that does a VM breakout and runs a command on the host.

Yeah it's great if that's what you want to do. Whether it makes sense for any rando to do that is another question.

> Model rewrites remove much of specific human dimension

Great. Isn't that part of being anonymous if one so desires? This would have decent potential to avoid stylometry deanonymization, no?

Maybe we'd see "coding gyms" like how white collar workers have gyms for the physical exercise they're not getting from their work.