Nobody can replace Rush, the show will eventually splinter. Just like nobody could replace John Carson, and you can’t have another “Woodstock”. These things are once in a lifetime.
There’s some “magic” in the “first” of something and when that magical first happens the natural reaction is to want it replaced or repeated. I can’t happen. These people and events are too special and unique.
Something new will come along, it’s unpredictable.
I like Steven Crowder. He comes closest to Rush in terms of combining humor with the politics.