One of the best things about a regular 32 hour/4 day workweek, that I think many people underestimate:
When you have a week and you feel that there are too many loose ends at the end of your week, you can come in on Friday morning and tie them up without the feeling that a) you compromised your weekend too much, and b) without having loose ends hanging over you for the weekend.
You don’t want to do it regularly, but it helps with stress reduction for me.