I'm going to make enemies here. I saw the original SW, first run - and wasn't impressed by its (what we've come to know as) SFX.
Thing is - before SW, 'special effects' were supposed to allow the viewer to suspend disbelief, quickly enough to get back to the story. The film-maker showed you a glimpse of a model/matte/whatever, in action. Then he showed it to you more slowly, meanwhile telling you "It's a gobblewhinger". So, the viewer told himself "OK, it's a gobblewhinger" and got on with the movie. It didn't really matter how 'accurate' it was.
But Lucas broke this, by making the SFX a star in its own right, displaying stuff long enough to show that it wasn't real, but that lots of money had been spent on it. Ever since, SFX has been lauded as if it deserves an Oscar of its own. But, if you're aware its a special effect, it isn't really effective, is it?