There is a poll of AI researchers floating. A lot are concerned with existential risks. I don't want to give a number because I can't exactly remember it.
I think there might be a reference to it in this article. Also, linking to a section talking about this proposal, since that might answer other questions you have.
https://thezvi.substack.com/p/ai-6-agents-of-change#%C2%A7ad...