I have repeatedly witnessed cases on other sites where otherwise great questions generating good content were closed because:
this question is likely to generate many "me-too" answers.
Most of the time where I saw questions that legitimately suffered from "me-too" flood, that came from new users who didn't know that they should instead edit in extra examples into existing answer.
As such, the problem could have - and, deservedly, had - been fixed via simply locking the question, which prevents low-rep users from posting new answers - but does not have the stigma of closing.
As such, I would propose that this site adopt an approach that a question should not be closed if:
It generates otherwise good content, better than elsewhere on Internet
And the main reason to close is the worry over future-generating a flood of "me-too"s.
And then, if we as a community see some question like that being overrun by me-toos, we simply clean them up once, and lock the question afterwards.
Of course, if the question is poor enough that it proceeds to generate useless extra answers even after locking, it fully deserves closing. But in my experience, most such questions can be merely locked to be fully redeemed.