Good comedies don't date. Maybe the references do, but here's one from the early seventies: and the slapstick relies on the oldest joke in the book
The trouble with the Academy is that it's ultimately concerned with the bottom line. The best comedies will live on, but it's actually the dramas that have a limited shelf life and have to maximise their returns before the fashion shifts. I can't say exctly how much an Oscar is worth at the box office, but it's a packet, and the entire Hollywood Who's Who have a vested interest. That is they have investments in the industry.
Okay that sounded a bit absolute, but I'm tired.