The chest burster scene holds up, up until the baby alien scurries off at the end. But there's a hilariously terrible effect later on where it cuts from a model of John Hurt's head to the real thing.
Edit: Ian Holm, not John Hurt. https://www.youtube.com/watch?v=VA8jv1M6Y2g
> Logan's Run
Oh god. I can't imagine anyone ever thought Box (the robot) didn't look completely awful.
It may lack good practical effects, but some of the matte paintings in that movie are gorgeous. I love when they get to the overgrown Washington D.C.
https://www.imdb.com/list/ls009003184/
Let's take a look at a few of the entry's from the 1970's that actually had practical effects:
Logan's Run - Here's Logan fighting a robot: https://youtu.be/USADM5Gk9Gs?t=106 Star Wars - : https://www.youtube.com/watch?v=1g3_CFmnU7k Soylent Green - https://www.youtube.com/watch?v=6Z2txLk0ybo Invasion of the Body Snatchers - https://www.youtube.com/watch?v=vc_0dlmSq7I Alien - here's the chest buster scene - https://www.youtube.com/watch?v=nPQ7om598OM
I don't think these hold up as well as nostalgia would suggest, the exception being the alien chest buster scene, which is amazing. The others are much less ambitious and simply don't look as good as modern movies. Many of the practical effects look small or toy like. Maybe there's a sweet spot in the 90's?