Maron's interview with Sally Wade about George Carlin's last years was a moving show. Sounds like he was a really sweet guy in his personal life (in marked contrast to his nasty onstage persona).
... but all that aside, I kinda wish they had devoted the entire episode to something that was discussed all too briefly: In the 1970s, young sitcom writer Sally Wade received an assignment to hang out with the Doobie Brothers so she could get their "vibe", prior to building a "What's Happening" episode around them.