Many people can't handle the pacing of older sci-fi movies. I remember watching the Andromeda Strain with my wife when we were teenagers. She said it was the most boring movie she had ever seen.
I enjoy a slow burn, but 2001 for preschoolers? Might work for nap time I guess.
I watched Tarkovsky's Solaris a few weeks ago. The pacing is very slow, but the long silences are calming like reading and evokes a certain mood. It's a nice change from non-stop action Youtube clips and Twitch streams.
That is completely true and at the same time terrifying. What does that say about how our brains have changed? Maybe it's not a problem, but if it is a problem I'm afraid it might be a big one.
I think it's a conditioning thing. I don't like some modern movies because it seems like every scene is meant to be a money shot. You have to build atmosphere to tell a story.