In the originals, the battle for the Death Star holds up.
In the prequels, you can see Jedi wildly waving their lightsabers at nothing because the CGI team forgot to animate in certain places.
In the originals, Yoda was a puppet, and his skin and clothing reflected light realistically. So what if his mouth movements had all of the nuance and subtlety of a novelty nutcracker? Imagination bridged the gap between what we saw and what we experienced.
In the prequels, Yoda was CGI, so he didn't have physical depth in the way the other actors did, and didn't reflect light in the same way as the physical cast, and it gave him an eerie, Photoshopped look.
CGI can make special effects look more realistic, but they also have a way of preventing things from actually looking real.
Also you may miss how much of the shows are CGI if you aren't looking hard. Watch a few shows from the 70s and 80s, ones with high production values, then watch the average show today and you'll see that audiences demand much more realistic sets and scenery. Just about everything in the background of a sci-fi show is CGI.