I don't really have an opinion on the fit.

But people still ask those questions and the questions apparently get indexed. In my experience the result is that when coming from a search engine, even for non-fit topics, it is quite common that closed Stackoverflow posts occurr several times on the first result page.

It could be that I search for strange things, but at least for me the combination of closed but still indexed posts are not helpful, especially when the question didn't get any useful answers at all before being closed.

I don't mind closing topics, but I would prefer that closed questions with no even remotely useful answers wasn't indexed at all. Now, that might not be entirely under your control, but the issue remains, or so it seems to me.