I noticed today that the pop-up screens for voting to close a question have acquired a new layer. Clicking "close" used to produce a pop-up with checkboxes indicating various reasons for closing. Now it produces a pop-up with only some of those reasons plus a new "community-specific" option. Clicking that option produces another pop-up with the rest of the reasons. Apart from decreasing efficiency and perhaps dissuading me from voting to close, what's the purpose of this change?
"Off topic" was renamed to "community specific reason". In the past there was some dissatisfaction with the name "off-topic", since in some cases it was related closer to the quality and the type of the question rather than to the topic of the question. (To use an example from Math Overflow, it often happens that the question is not research level, but the topic of the question - such as number theory, group theory, linear algebra, etc. - belongs on the site. So the question is made unsuitable by its level rather than by its topic.) Some related discussions: A feature requested for the purpose of avoiding unintentional newbie-biting on Mathematics Meta and Can we rename the off-topic close reason label on the primary screen? on Meta Stack Exchange. (I do not recall this issue being discussed on MathOverflow Meta.)