But do they have "Ludicrous Speed"? ;)
Seriously though, I think they wanted to save the hyperspace shots for big dramatic moments, like the Falcon's last minute escape in ESB, and the whole Rebel Fleet in Jedi. I admit I was surprised the rebel fighters could jump back in '83.
Whether rebel fighters could jump in SW is murky, however, Luke and Leia are off on a long mission in a X-Wing and a Y-Wing in Splinter of the Mind's Eye, which almost became the first movie sequel.