He "dropped" the feud in time for the 40th anniversary - That's why his appearance on that is kind of weird, where he doesn't make a joke or do a bit, he just talks sincerely for like a minute or so. After that, he's hosted and been slightly more involved.
I also love that Tracy is clearly one of those "comic's comic" guys. His act is a bit limited overall, but he's just so damn good at cracking up late night hosts and other comedians. His dynamic with Conan is great, one of the few guys who can get Conan off-balance. (The other one is Kevin Nealon, of all people, who had an off-the-wall podcast with him about two weeks ago.)