I already work a 4 day work week. 4/10's. I get up at 3 am. I fight traffic on the way home which doubles or triples my commute time home. It's not all it's cracked up to be.
I think 4/10's is already doable in a lot of industries but I question why they expect it to continue to be a 40 hour work week, or expect us to be paid more money for less hours. Nothing has trended that way in the entire time I've been alive. Feels like a pipedream.