I mean, 8 was easily the most functional of the new trilogy, if a somewhat overly ambitious muddle, so that's a bad example.

There is a real problem with too many sequels and adaptations though.

8 is at least the fourth best Star Wars movie.

Maybe 3rd. Jedi is gorgeous but the script for everything past Jabba’s Palace is a mess. Doesn’t know what to do with all its characters, feels the need to have them all around anyway.

If 8 had followed through on its narrative promises, it would have had a chance. But unfortunately, much like a modern LLM that exceeds its context window, it lost its way in the final act.

As for sequels, we are at a weird time in history. Due maybe in part just how prevalent media is and how easy (relatively) it is to create, we've been super-saturated in "like X but with Y" stories. We have dedicated websites mapping tropes. It's hard to come up with anything that hasn't been done a few million times. AI will probably accelerate that, and I can't say I know what comes next.