All the more reason people would prefer to work for a co-op, no? I really don't know why there aren't more co-ops, and am inferring they just don't work all that well. But if there are any regulations or something preventing them from succeeding, I'd love to know about it.

Also, I guess it's worth noting I've been "exempt" all my life (not subject to 40 hours a week), so that particular labor win I guess didn't really cross my mind.

If everyone has 40 hours a week + overtime and you have a coop that pays competitively for 24 hours a week and no overtime you won't get as much market share, can be outcompeted. It has to be done on a large scale, historically as a matter of policy. This was true for tons of different reductions in the workday and other labor rights improvements in the past.

They can't strategize and adapt very quickly, because of all the cooperating.