I was a part of the Zulip project as a contributor and have contributed > 100 commits to `zulip/zulip` and also admire Tim a ton. But, leaving you're life's work to work on "long-term benifit of humanity" at Anthropic doesn't sound right to me. I am guessing Tim isn't going to work on safety research or interpretability side of Anthropic, that's not his expertise. Hence, leaving Zulip to help build anthropic a new software is meh. There are labs who actually care about people and aren't pretentious like Anthropic. Nevertheless, wish him, alya and rest of the team all the best; they are genuinely nice people. I don't know if I'll have interest in sticking to the project anymore though (+ I am not sure about other core member's status like Anders -- that will affect my decision too).