The idea of HN being dismissive of impactful technology is as old as HN. And indeed, the crowd often appears stuck in the past with hindsight. That said, HN discussions aren't homogeneous, and as demonstrated by Karpathy in his recent blogpost "Auto-grading decade-old Hacker News", at least some commenters have impressive foresight: https://karpathy.bearblog.dev/auto-grade-hn/
So exactly 10 years ago a lot of people believed that the game Go would not be “conquered” by AI, but after just a few months it was. People will always be skeptical of new things, even people who are in tech, because many hyped things indeed go nowhere… while it may look obvious in hindsight, it’s really hard to predict what will and what won’t be successful. On the LLM front I personally think it’s extremely foolish to still consider LLMs as going nowhere. There’s a lot more evidence today of the usefulness of LLMs than there was of DeepMind being able to beat top human players in Go 10 years ago.