This happened with X/Twitter. What it resulted in was a sycophantic hug-box on Bluesky and amplified social-darwinist amoral techno-capitalism on the former site. I believe splitting the rare congregations of diversely oriented smart people leads to worse outcomes for everyone, as better ideas/conversations emerge from opposing sides rubbing up against each other. Bifurcating HN would probably lead to a hype-driven, noisy AI side and a myopic, increasingly anachronistic non-AI side.