What old movies hold up because of a lack of special effects or because clever use of effects?

https://sh.itjust.works/post/49579543

What old movies hold up because of a lack of special effects or because clever use of effects? - sh.itjust.works

What older movies made a good use of either side stepping special effects or have effects that somehow still hold up today? Why are they good movies?

Definitely Forbidden Planet. Killer electronic music soundtrack as well.
It is a little slow at times, but the fun bits are really awesome. And you can get a linux package to display system info as !Krells