It's possible that Google is leading me astray since that's typically how I'll find Q&As on there, but I don't see the same issue on the other sites in the Stack network.
I am not sure if SO is less useful or just has become less useful _for_me_ over time.
IMO "use the documentation" is not enough, many times you have much more complex question or bugs/problems where if lucky other individuals hit them before you and were kind enough to share their findings. I upgraded my Ubuntu version and now some people decided that is safer and smarter to move the /tmp in apache to some other place but at the same time hide it from me, I am not sure what man page search query for "my file is not in /tmp but the system is telling me is there" will give you the results.
On some stacks, you depend on SO for everything. Others have much more complete and usable documentation somewhere else that answers any question that SO would accept, so people don't need it at all.
edit: It's not back.