This is the future (5 - 10 years) for every one of the devices we all use.

I’d rather they all prioritize security, rather than extensibility.

Reading more about Pythonista, it’s seems unlikely that you could build a stateful Apple 1 emulator. But even so it looks cool. Arguably a little too permissive for my liking on iOS. I hope Apple closes all of those Inter-App communication channels. That seems like a security risk waiting to happen.