That might be a good thing after all, at least in a certain sense. Stack Overflow has been dying for the last ten years or so. In the first years there where a lot of good questions that were interesting to answer but that changed with popularity and it became an endless sea of low effort do my homework duplicates that were not interesting to answer and annoying to moderate. If this now gets handled by large language models, it could maybe become similar to the beginning again, only those questions that are not easily answerable by looking into the documentation or asking a chat bot will end up on Stack Overflow, it could be fun again to answer questions on Stack Overflow. On the other hand if nobody looks up things on Stack Overflow, it will be hard to sustain the business, maybe even when downscaled accordingly.

Is it really dying? There's only so much growth possible without having it flooded with low effort stuff. They try to instead grow by introducing more topics, but that's limited as well.

I personally didn't use it so much (meaning: Writing content) because it always felt a bit over engineered. From what I remember the only possible entry point is writing questions that get up voted. Not allowed to even write comments, vote and of course not allowed to answer questions. Maybe that's not correct but that has always been my impression.

In general stack exchange seems to be a great platform. I think "it's dying" has an unfortunate connotation. It's not like content just vanishes, just the amount of new stuff is shrinking.