Unless you have like a beachfront university, no one should be spending more than ~ 20-21 hours a week at actual working (commute included). Slight caveat 1. once decent VR gets here, and you can make it to a reasonably nice VR beach from home, sort of like in that Valerian movie... but more MMO style. Slight caveat 2. if your work is really fun or (reasonably) progresses the state of humanity to where no one really needs to work / everyone is supermodels / environmental and social problems are all solved etc.

(I say this with out considering it that deeply, but it's probably right.)