I arrived at the MIA AC yesterday afternoon to do some work before a 7PM flight and it was dead. About an hour later after a call I looked up (around 5PM) and the MIA D30 AC was packed to the gills. Looked like typical pre COVID 19 days, even with few evening International flights. The terminal was also packed albeit with a reduction in the flight banks I've noticed there's a much more pronounced ebb and flow with crowds.
My flight to RDU F was less than half full (love when I get a row to myself) and based upon the number of paxs that seemed to troop through the F cabin Y couldn't have been much more than half full. Great F FA that did beverage refills.