When I used stack overflow more, I was doing stuff with web technologies and Unix command line tools. These days I’m much more experienced with Unix tools; I use more specialised tools that aren’t mentioned on SO, use a programming language which isn’t often mentioned on SO, and a large array of libraries which are even less frequently mentioned there. I’m also generally better at finding my own way around—digging through code, jumping to definitions, looking up errors. I think the reason I don’t use it so much is that it is less useful because it doesn’t have the answers I care about and because I have fewer questions for it to answer.