> Pure utopias were very rare for a reason: They're really hard to set compelling in stories in, and so most of the ones that do exist tend to set stories on their edges and fault lines.

True, and I think Iain M. Banks specifically commented on this in interviews and essays. The Culture novels are mostly set outside of The Culture. Star Trek is mostly set on the fringes of or outside of Federation space, but especially during Roddenberry's lifetime, no matter what the crew was dealing with, they were very self-consciously people from a utopia.

I like your analysis of Cyberpunk.