One of two things is happening here. I'm not sure if its one or the other or really both.

1. Copilot and LLM trained on code is reducing usage of StackOverflow.

2. People are just coding less and searching for less with layoffs and slow down due to burnout.

But it's definitely connected to these points. The degree of magnitude for either though is difficult to assess.

If it is mostly #1 though that's the worst thing isn't it? Because SO is weakened and then the LLMs gradually become less effective. We generate less curiosity and public discussion overtime as people use AI and LLMs more. That's sad for software engineering as a whole. One of the best parts of this job is collaboration and problem solving. Not just individually but as a community as well.