According to the "close" box, "too localized" means:
This question is unlikely to ever help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet.
However, topics in separated branches of math are usually "only relevant to a small geographic area" and "extraordinarily narrow situation" to the worldwide audience of the internet. But they also usually have high value so are not "unlikely to ever help any future visitors". Thus should not be treated as "too localized".
So is it impossible a question "too localized" in MSE?