This is actually one of the use cases I really like. I'll often deliberately add a question with an answer if I think it is something I'll use again in future and is not found somewhere else obvious on the web.
Re:The Stack Overflow Age
by nt8eo923nt45 on Friday April 06, 2018 @04:45PM
(#16777239)
You can often find the people more knowledgable on a particular subject in one of the other stack exchange sites. (For example, a problem with OpenGL or Unity might be better asked on gamedev.stackexchange.com, or computergraphics.stackexchange.com.)
In cases like that I usually just end up answering my own question later, after I've figured it out by other means.