20 000 leagues under the sea, walt disney productions. on set, 1954
Why the original Jurassic Park didn't suck.
Same reason why the original Star Wars movies were WAAAAY better than the prequel trilogy. They actually made things, props, animatronics. Stuff you could touch and look at and interact with. Actually seeing a giant T-rex staring at you is nothing like staring at a cardboard cutout or a tennis ball on a stick.
On the set... a different perspective. ("Honey, I shrunk ... well, everything! I swear, I was aiming at the monkey.")