I've given some thought to #2, from the perspective of a mildly-transhuman child left by herself in a jungle (it's a novel..), and came to the unfortunate conclusion that...

Maintenance is a killer. There comes a point, fairly early in technological development, where it's simply impossible for any single person to keep everything working and still have time to improve on the situation.

That's true for even the most benign of environments. Hana, unfortunately, was stuck in a rather damp jungle.

(And to preempt the possibly inevitable question, find it at https://forums.sufficientvelocity.com/threads/song-in-the-fo.... Read if you feel like; I like to think it's cute.)