not many people have seen it, these days only limited and niche people would see 2001. For that reason the stats on it would be skewed towards people who would view it more favorably.
It's a film a cinemaphile would watch today for either nostalgia or historic interest. Whatever its place in the film canon (which it richly deserves) I'm pretty sure the random theater-goer today would hate it and I wouldn't really recommend they go watch it.