EA started as an offshoot of LessWrong, and LW-style rationalism is still the main gateway into EA as it’s pushed relentlessly in those circles, and EA contributes vast amounts of money back into LW goals. Air strikes against datacenters guy is basically bankrolled by Effective Altruism and is also the reason EA considers magic AIs (so called Artificial Super Intelligences) by far the most important risk to humanity’s existence; they consider climate change mostly survivable and thus of far less importance, for instance.

Needless to say, LLM peddlers loved that (when they aren’t already LW/EAs or adjacent themselves, like the previous OpenAI administrative board before Altman and Microsoft took over). edit: also the founders of Anthropic.

Basically you can’t discuss one without referencing the other.