What does that actually mean? If you ever benefitted from asking a question on SO and getting a mix of answers at varying levels of quality, or responding at one of those levels, what would stop you from benefiting from that participation now? I assume it's not the fact that anyone could use your content for any purpose, since that was the stated goal of SO from day one.
In short, I don’t prefer to feed LLMs with my own content. When a site announces that the content provided by its users will be used to train a model, I leave the place.
In the past, the state of the community has already made me to use Stack Exchange as the last resort, and this move completely closes the doors.
This likely won't work in the way you expect, SO is similar to wikipedia in that it retains all edits and allows other highly ranked users to edit your answers, additionally, there are already many snapshots of your answer that were fed into all the various AIs so all you'd be doing now is hurting new developers who are attempting to solve the issue you answered.
I see a lot of anger on this thread, from you and others, and am just surprised. I didn't expect it on HN.
I for one am very much in favor of the idea of the public domain (or CC, or the Open Source movement, or SO's license). Paraphrasing the Voltairean principle, I might not like what OpenAI or others do with my limited contributions to the world's knowledge base, but I would defend to the death everyone's right to do whatever they want with it.