90+% of message-board nerds think 2001 is one of the greatest movies ever made. Include me in the 5+% who think it's insufferably boring and couldn't even finish a re-watch. Consider the very long scene where the guy makes a Happy Birthday "Zoom" call to his kid: Is that alluring or thought-provoking here in the 21st-century?
Sometimes, when watching a boring movie, I turn the play speed up to 150% or so. Even that didn't help 2001.
Fifty-three years ago, I drove across the Bay Bridge with my first real girlfriend to watch the premiere of 2001 in San Francisco. I think I liked it okay then, though I'd already read enough sci-fi that the Big Deal or Whatever™ of The.Ending™ was "old hat."
When I admitted to disliking 2001 on The.Other.Message.Board, I was told that I was a moron who only likes car chases, and can't stand thought-provoking movies! Come on, TFTers, see if your insults can outdo The.Other.Message.Board !
(I once worked closely with a guy who is a minor celebrity because of his touting the legacy of 2001. On 12 January 1992 he made a big deal about HAL's birthday.)