This answer says:
"We have tags where there are few-to-no experts, which makes the chance of getting a semi-difficult question answered very low. This is a deficiency in StackOverflow which is worth addressing"
I would like to know how I can find out tags which have few experts? I mean tags like where questions are asked but which often do not have satisfying answers?
Many programmers of us have surely seen a lot of different technologies, and might also have some experience in technologies which are not widely-known.
I think of a feature where I can browse such "few-expert-tags" and maybe find one where I think "hey, I have some experience in that, maybe I can help!"
Of course you could just add this tag as one of you favourite tags, but the idea behind this feature is that you may have forgotten that you know something about this technology, so you would not add it as favourite tag, too.