I often leave very early, to catch a flight or hit the road. I don’t always visit the front desk to check out. I don’t always check out in the chain’s app because it sometimes doesn’t work.

It seems reasonable that if the room looks vacated, the cleaners are going to do their thing. Not very common (in the big picture) that the guest will come back, so waiting until noon is a waste of time. Those of us who like it when a room is available way before checkin time will appreciate it.