Legal progress yes, but it had plenty of loopholes and pushback and wasn't normalized until the Ford Motor Company did it (combined with going from a 6-day work

Legal progress yes, but it had plenty of loopholes and pushback and wasn't normalized until the Ford Motor Company did it (combined with going from a 6-day work week to 5 days), because Henry Ford believed the extra downtime would increase productivity and possibly even demand for the cars he sold. His success compared to competitors is why everyone else followed suit.