From personal experience working 4 days a week, and talking to others who have done so, the change to shorter hours is definitely a forcing function: you end up

From personal experience working 4 days a week, and talking to others who have done so, the change to shorter hours is definitely a forcing function: you end up prioritizing better and planning better because you have to. I talk about the contrast between the "work longer!" attitude and the "work less hours but still produce the same" here https://codewithoutrules.com/2018/02/11/working-long-hours/ https://codewithoutrules.com/2018/02/11/working-long-hours/ and here https://codewithoutrules.com/2016/08/25/the-01x-programmer/ https://codewithoutrules.com/2016/08/25/the-01x-programmer/