Now I don't know what
endless-sphere is. Let's not worry about it.
Phys.org sez:
Work less to save the planet? How to make sure a four-day week actually cuts emissions
I read a book in the 1970s by a Texas oilman titled Time Wealth. Internet knows nothing about it, I may still have my copy.
His hypothesis is that a four-day week won't work because the factories would sit idle three days instead of two. Three 10-hour days means a thirty-hour work week, and with two shifts the factories hum six days a week instead of five.
Plus which, if you like the way it is now you can work two shifts for a 60-hour week.