I've been thinking that the real problem with Star Wars (both Prequel and High Estrogen) and the Ghostbusters Reboot is that they're expecting to tell complete story over three movies. Beginning in one, middle in two, and end in three. So each series delivers two movies with neither a satisfying climax nor a proper cliffhanger.
By contrast Ep4: A New Hope had a real ending. So did Ghostbusters (OG).
Money is part of it, but I think the netflix format is pushing too. We can get a dozen 45min shows released all at once, binge all day now. The art of telling the story, characters, side goofs, all takes time. So much can be done in 5-10 hours of a netflix binge. Even better when you get two or three seasons.