I am not sure that is the problem.
Other places are still crowded.
I went to Italy last October in the OFF season and it was packed with Americans.
I just watched a YouTube video last week and Rome was packed with Americans and it was over 100 degrees and humid there.
I am going to Bar Harbor next month. The place I am staying is sold out.
I think the issue is with Vegas.
Even the off season would be cheaper. People seem to have a lot of money for concerts and sports tickets. Unless they’re paying with plastic. I see a lot of people at farm markets for a day with the kids. Before COVID the place would almost be empty on a hot Saturday afternoon in the summer. Now it’s packed even though produce cost double than Wal-Mart there.