I suspect you’re on to something here. As someone who detests football I don’t even bother to listen to Rush during football season.
Football is his passion. That used to be conservatism and it showed in his work. There was passion, anger, drive and determined resolve. That’s gone it seems to me. Sure, he’ll get angry and still put up a token defense of conservatism and he’ll go off on the target du jour, but it’s perfunctory - rote and his heart just isn’t in it.
You give him one little break and he’ll be off talking about football or golf and a heartbeat. Most times when I hear him now he’s going over things I’ve already read about, thought about, and his opinion on it really isn’t anything new or innovative. Right now he’s a rich man with a good income and he’s skating.
I'm a dial-outer when it comes to golf, I go get some nice pleasant interesting stuff from Praeger for awhile, and then wander back to Rush after half an hour, just to get my low-blood pressure problem treated.