When I see Dave perform, to me, he is a combination of George Carlin, Paul Mooney, Richard Pryor, Eddie Murphy and a sprinkle of Rodney Dangerfield. Loved his Netflix body of work. All six releases. Dave has spoken historic and current hard truths about American society, both within his standup work and outside (speaking engagements, interviews, etc.).
That said, I found the nonchalant manner in which Dave introduced Elon to the crowd then saying "controversy, buddy", while Elon awkwardly looks upon the sea of boos, to be hilarious AF

Dave quieting the jeers to get a few more jokes in and to close out the performance shows professionalism for his craft in addition to possibly keeping Elon off of suicide watch. Prolonged boos may literally send that fool off a cliff. Elon comes off as very brittle and unstable concerning the rationale he gave for purchasing twitter.
Philosophically, Dave and Elon don't seem to have much in common but some of Dave's friends are from various walks of life.