My read is "return to hands-on technical work" is more important than "AI alignment" aspect, since he is quick to clarify OpenAI is also supportive of AI alignment research. But maybe it is difficult for him to return to hands-on technical work at OpenAI.
2. Greg Brockman is on sabattical. Doesn't look like he's leaving.https://x.com/gdb/status/1820644694264791459
3. John Schulman joins anthropic (he cites alignment as a research interest)
Source https://x.com/jon_victor_/status/1820622558875787421