Are questions about things that are not music performance but relevant to the performing of music still on topic? We had somewhat of a differance in opinion in regards to this in this question
The linked question is off topic because it is a question from/about the audience side of the performance.
I can imagine applause related questions that are on topic because they come from the performer side. Performers may have questions with respect to managing their stage presence during applause, and these could be on topic.
I think the question as written should have been posted to music fans, but I believe there are plenty of questions related to performance practice and programming that could be written from the perspective of the performer.
For example, there are some unspoken rules about programming art song, whereby you would typically group together songs by language, and applause would only come after each set. By contrast, every classical musician knows there shouldn't be applause between movements, and this difference in context and audience for the question is exactly why we have multiple sites and off-topic close votes in the first place.
I think the question about applause is useful because it gets at how people can distinguish between the ends of movements and the ends of whole pieces; this is a valuable question that has both historical and theoretical implications. Also, given that the answers given are very good, I think this question and others like it should stay. It is entirely likely that many questions that may work well in other stack exchange communities also work well here.