^I wonder if things would've been different if TOS, like Mission: Impossible and various other '60s shows, had gone through cast changes during its run. We lost Rand and gained Chekov, and there were a lot of cast changes between the pilots and the regular series, but otherwise the cast remained quite consistent, and that's what the fans expected and what the movies stuck with. Perhaps if there'd been more permanent and major cast changes in the show, then the audience would've been more receptive to further cast changes in the movies.