If they genuinely believe the tech is dangerous, how would it be acting in "good faith" to keep developing it, prepping an IPO, etc.?
The fact that he would suggest this despite preparing for an IPO is an even stronger signal that it's in good faith -- it will almost certainly delay or reduce the valuation of the IPO.
No it won't.
This is a call for a "safety cartel"[1] in which the dominant firms become more entrenched against competition by colluding to limit the progress would-be competitors can make in the market.
No, the essay does not talk about "stopping development". That's a very clever sleight of hand made in the essay to get readers to draw this false conclusion.
It just talks about building AI at a "balanced rate". Untangling the corporate speak, this amounts to essentially "go full steam ahead, but have more eval oversight before release".
So, i think they're hopeful for the help and terrified of the harms and are maybe trying to slow down on the amplifier of those effects for now.