I can wear mine indefinitely. Never been able to keep IEMs in comfortably for more than a couple/three hours without adjusting, taking a break, etc, before the JH13s. Easy to wear for long stretches.
Been afraid to ask why you are drinking and eating at Cedars Sinai, David, but glad to hear that the reason isn't too bad. I'm sure Joann will be great and she and Bugsey can convalesce together while you take care of them! Good thoughts going your way.