My understanding is that Warren gave up his seat as CEO but is still the chairman, and is still at least peripherally involved in investment decisions at Berkshire
Also these are year end portfolio changes, so could very well be Warren.
When things go well, it’s amazing. When things go poorly, you realize how anti-guest the policies and support team behave.
That’s when it changed for me. I realized how pro-host, anti-guest they are. Hotels generally seem to care when something goes wrong. Airbnb support behaves like you have inconvenienced them by raising the issue.