David Remnick did this interview with Conan O'Brien for The New Yorker and it doesn't seem to be behind a paywall at the moment. He talks about hosting the Oscars, about the passing of Rob and Michele Reiner, about comedy in general and so on.
I went from really liking Conan the first five or six years of Late Night to not being able to watch him. He seemed to go from being a really good interviewer and straight man for funny people to someone determined to be the funniest person on his show and to top any other funny people who came on. The show had very good writing and did genuinely brilliant bits but after a while — especially after Andy Richter left — there was less smart writing and more "Let's put Conan in a situation and let him be a smartass."

For all the blaming of Leno and NBC for the failure of his Tonight Show, I still think the problem was that he came on too strong and didn't provide a safe space for his guests to be at their best. He toned it down a bit for his TBS show and I actually like some of the podcasts he's been doing since. A friend of mine said, "That's because he's talking with his guests instead of pandering to a live audience" and that may be it.
Anyway, read what he has to say. He's a smart guy and I still really like the whole story of how he was plucked out of nowhere, put in a job for which he lacked experience, not supported (then) by his network and yet he managed to turn Late Night into a show that was all his, very successful and — for a while — a really good program.