I really like the term “Science Fantasy”. It acknowledges the parallels with Science Fiction but respects how they differ as well.

Shanara chronicles, too.

Yep, they visit ruins in one series that is pretty clearly the ruins of Tacoma or some place like it.

Terry Brooks happens to live in that area. Coincidence? :)

Yeah, in my mind, Sci-fi is more than just space ships or aliens or futuristic tech (though those are loosely part of it), it’s more about exploring different questions, under the guise of some sort of new technology. “Hey, we invented this thing that can remove racism from people’s brains, but it also makes people love-obsessed and creates dependency issues in people. Should we use this on the population?” It raises moral/ethical questions about what we could or should do given the chance.

Star Wars is straight-up fantasy with high-tech aesthetics, but it has more in common with Lord of the Rings than it does with anything sci-fi. It’s about a hero’s journey and good vs evil.

I wonder if you couldn’t do a reverse Fantasy/Sci-fi story? Basically a sci-fi sort of story with fantasy trappings. Like a fantasy story that looks at some new magic development and what the implications for humanity are of that new magic process. “We perfected an alchemical process to turn poop into gold! Should we flood the market with poo-gold and crash the medieval economy?”