[LIV2]

For me it's fun being able to play around/make hardware for a system that is still simple enough for one to understand broadly how the whole thing works.

The schematics are available for them & they're documented really well

People still make software & games for it for presumably the same reason, then there's people who are into it for the nostalgia and the games.

[myself248]

This is huge. Even the Raspberry Pi doesn't have open schematics or firmware.

The Amiga era was the last good overlap of "you can know everything about the machine" and "the machine can do useful things".