There seems to have been very little advancement in technology between the old republic and the later Empire/Republic from the movies.
Even things like the Death Star seem to be more of a matter of scale than true advancement (basically if you're the dictator of all known space you can throw enough resources to build your own moon). So why has technological progress stagnated?
We know that more advanced technology is possible (there seems to be plenty of big dumb objects like the star forge floating around).
I'm not too familiar with the Star Wars setting outside the movies and the Kotor games so if this has been answered in a novel or something feel free to spoil it for me