A manufacturer tried the 4-day workweek for 5 days' pay and won't go back

As an industrial engineer it’s amazing that this is proving effective in manufacturing environments. I’d suspected it would but much like with WFH, I assumed this was one of those things that had a chance of catching on for office workers but wouldn’t in factories.

The 40 hour work week was a massive success not because it was just right but because cutting hours so workers can rest was hugely beneficial

Funny, I work in a prominent RV company and in 2022 we went to 4 days, too. Productivity is up, morale is high, and there is zero discussion of returning to 5. I wonder if my company partook in that experiment. Has a list of companies been posted anywhere?