1. Toxicity and Over-Moderation
Users repeatedly cite hostile moderators, trigger-happy closures, and negative feedback as repelling askers and answerers.
vjvjvjvjghv: "I asked a few very specific questions about some deep detail in Windows and every time I got only some smug comments about my stupid question or the question got rejected outright."
ForHackernews: "I stopped asking questions because the mods were so toxic, and I stopped answering questions because I wasn't going to train the AI for free."
eterm: "Look at the newest questions... Most questions have negative karma... that's not a healthy ecosystem."
2. LLMs as Superior Replacement
AI tools like ChatGPT deliver fast, non-judgmental answers, accelerating the exodus.
IshKebab: "It is sort of because of AI - it provided a way of escaping StackOverflow's toxicity!"
porcoda: "Not a big surprise once LLMs came along... For all their flaws, LLMs are so much better."
jtrn: "Could view it as push/pull dynamics: pushed away by toxicity, pulled to good answers from AI."
3. Pre-AI Decline from Saturation
Question volume peaked ~2014, then fell due to answered basics, better search, and corpus maturityβLLMs just hastened it.
Someone1234: "ChatGPT release: late 2022, decline start: mid 2020... instead of the toxicity... despite the design."
eviks: "The steep decline started way before llms."
f311a: "After some time there is a saturation point where all basic questions are already answered and can be found via Google."