Decline of the Catskills and Jewish stand-up comedy
I admit that Jews appear to be a declining force in stand-up comedy, not as dominant as they were forty years ago.
I think this coincides with a decline in the Catskills as a vacation spot for Jews. That Catskills were where Jews went to vacation back in the days when air travel was expensive and Jews were less wealthy (and more prole), and also when Jews were not welcome at gentile white resorts.
The major night-time entertainment in the Catskills was stand-up comedy. Thus did the Catskills provide a training ground for Jewish comedians (where no doubt they started out doing weeknight shows at lesser hotels, with the cream of the crop rising up to doing weekend shows at the big hotels like the Concord and Grossingers, and then out into the gentile world of movies and television), and that training ground no longer exists. And probably, smart young Jewish men today are too busy going to Ivy League schools to become stand-up comics.
Jewish stand-up comedy is likely a victim of assimilation.