That's why I don't want to even go into mobile development - pretty much the whole market is gated by two oligopolists who have random capricious policies and c

That's why I don't want to even go into mobile development - pretty much the whole market is gated by two oligopolists who have random capricious policies and can - and do! - destroy thousands of hours of your work without even properly stating a reason and without any recourse. You work for years, you put your thought and love into something, you release it, people are happy to use it - and then some (probably severely underpaid and overworked) anonymous, or ever worse, a mindless misconfigured ML routine, pushes a button and poof! - it's all gone. That's an insane world to live in.