56 years later, this movie is quite dated

That's to be expected. But it was also soooo slow.

When I watched it recently, I wondered if there was something wrong when the first 8 or 9 minutes is just a blank screen with some kind of ethereal music in the background. Then in the middle, they cut to a ten-minute intermission. An intermission in a movie that is 2-1/2 hours long? C'mon. Then the kaleidoscope of images as Daves is descending toward Jupiter, or maybe an alternate universe. Not sure how long it lasted, because I fast-forwarded past it. But my guess is 8 or 9 minutes. And other instances I won't even go into. It could have been an hour shorter, IMO. I know that won't please the fans of it, but to each his own.