I clicked a link from a 2-year-old Hacker News thread, and Nielsen Norman Group served up a 404 page. On that 404 page, NN/G served up an educational message for visitors who arrive from ChatGPT, Claude, or another LLM:
(Did an AI chat send you here? They sometimes get URLs wrong or hallucinate nonexistent NN/G articles.)
Is this a new best practice for 404 page design?