Ahhh, finally a fellow Hitchcock fan in the crowd.
I’ve noticed a correlation between higher hotel room beds and the introduction of the shadow box enclosing the under bed area.
Then again, no need to connect elevation to causation. 
Several actually. One of my coworkers, who is a wheelchair user, does site checks for one based in New Hampshire.
This must have been back before they had hookers on treadmills.