Saturday 2/20/21 data point
Got in at 3:30PM on Saturday and arrived to closed EA/ES Aisles with a sign to make the short walk across to Alamo. Waited in a very short line on the Alamo side and was given the option to take an upgrade to an Expedition/Yukon/Suburban, or wait about 20 minutes for something smaller. Took the upgrade and ended up with a brand new Yukon SLT with 350 miles on the clock. Super pleasant experience.