Just think what “Star Wars” would’ve looked like were it released in 1967 instead of 1977.
Yeah, a lot fewer spfx and rocketships that look right out of Buck Rogers and Flash Gordon.
Probably would have used more American actors too.
On that last point, Star Wars was made in Shepperton Studios and ‘2001’ was made in Borehamwood.
I think Space:1999 was also made in the latter.