I've seen a couple over the years: Robin Hood, Twelve Chairs, Blazing Saddles, and most recently Spaceballs. I found them all funny, theoretically, but they rarely got an open laugh out of me. It seems like most of the time this is just because the comedic timing makes every joke or funny bit land very awkwardly, or with just a bit too much space to leave room for any subtlety or reward for the watcher.
I feel like I remember the few I saw as a kid being funnier at that time. Is it just because my brain has been attention-poisoned with the rapid fire wit of modern comedic television?
i'm not sure. When I rewatched The Producers and even though some of the cultural references are outdated on paper, it all lands hard (like i think the character of Lorenzo Saint Dubois makes no sense to a modern audience, but his sheer show-stopping weirdness carries the gag, and if anything I think is funnier than the pandering gay joke they did in the remake).
Then again I think the 3 Stooges still kill