Originally posted by queeq
True.But Sw had no reason to stagnate... they had three movies with a lot of new characters, main characters.
In the OT's case you could say the overall success scared the actors into potentially being typecast, which still happened for some of course; and it gave no opportunities to go forward without them. In the PT's case, with the new characters you've highlighted, they either do not fit with the OT or didn't survive long enough for any meaningful expansion on them.
Star Trek did this too though, they had throwaway villains but they had the ability to keep it fresh by having storylines with all sorts of races that kept re-appearing. The advantages of several series also allowed for specific villains or surprise past or present Starfleet characters to appear and contribute.
ST also embraced whatever technology was at hand and went along with whatever there was to use so it seemed like the transition between Kirk's movies to TNG/Generations wasn't that much apart. Lucas, I believe, wanted to wait for better technology before doing the prequels which was a mistake in the sense it left SW fans with nothing for 16 years and when he did make them with all the CGI it made the history of the OT look like the future.
To completely move on from the OT you would have to jump SW drastically into the future in order to account for the modern looking look but even then you'd have this problem:
PT: Modern CGI look.
OT: Old school 70/80s effects look (with improvements no doubt but some things you can't CGI).
Star Wars - The Future (or whatever, I'm reaching here 😄 ):Even more modern CGI look .