I think I'd prefer the 4-day, 8-hour-per-day work week over the 6-hour work day.

I've worked regular 40 our weeks, 9/80s with every other Friday off, and 4/10s with every Friday off. So, 8, 9, and 10 hour shifts. I still want a 6 hour day, 30 hours a week for the same pay. Longer days just are not as productive for me - I do my best work in abut 6 hours, the rest just isn't as productive. I think I would actually be more creative with more freedom in my day.