Researchers (general)
The cross-cutting ML research community outside the frontier labs. Nathan Lambert at Ai2 on what post-training really does (and writes Interconnects), Stella Biderman at EleutherAI on open model science, Yoav Goldberg at Bar-Ilan on NLP, Luca Soldaini and Kyle Lo on open data. Less institutionally anchored than academia or the labs; more likely to start a methods debate that lasts a week.