Based on that experience, I'd also be open to such an arrangement for employees based in geographies where that's not legally required, but is legally and practically permitted. My guess is that most people are working a 5-day workweek because they're most comfortable doing that, from both a "well, all of my friends are doing that anyway, so I wouldn't have anyone to hang out with" as well as from a "I'm working for my financial future and working only X hours per week is unlikely to give me the same career trajectory as working 25% more hours per week" perspective.