About two years ago there were all these discussions about the number of unidentified albums causing performance issues, with support staff weighing in on these issues in many threads. I can’t easily find the relevant posts but I know that the many discussions eventually l led to this poll:
as well as to many pleas to add a button that could mark albums as „don’t identify“, e.g. for albums that we know will never be identified.
If Roon didn’t try to periodically identify, I don’t know why the number would make a difference to performance. And the frequent idea, back then, for adding such a button leads me to believe that people were quite sure that it would retry - most likely, I believe, based on the things support staff had said.