[JulianRaphael]

In my case the question has often unearthed things about the team culture that may work well for some and not so well for others. One example: a person I had an interview with told me that he wouldn't recommend a candidate to join the team if said candidate e.g. wouldn't get along with the typical "tech bros" team culture, which obviously wasn't something mentioned in the job description. For me that was clearly a no-go, for others this wouldn't be much a problem because the job in general was a very interesting one and very well compensated, too. OTOH, I've also heard non-trivial things in other interviews which were not mentioned in the job description but weren't a show stopper for me.

I also use the questions to learn more about the person and culture: if all people say "there is NOTHING I would change, this is a dream job" there is a very high likelihood that this is an environment where you don't speak openly about ways to improve and where individuals keep their criticism for themselves.