Been thinking about this for a bit and wanted to gauge the temperature on it:
I think the ideal work week is 25 hours. No more, no less. 5 hours a day is long enough to get a lot done and contribute substantially to whatever your place of work does, and short enough to feel like you’re not there forever and have a full day outside of work.
Keyword here is ideal. Most people won’t find themselves in a position to live this way anytime soon. But this sounds like what we should be striving towards as a society.