This would apply to a lot of tech workers I think, especially those working on big tangled mess codebases (which is most companies). On bad codebases, it's sim

This would apply to a lot of tech workers I think, especially those working on big tangled mess codebases (which is most companies). On bad codebases, it's simply not physically possible to work 40 hrs/wk and not burn out, so people find all kinds of ways to cut down on hours working, either by goofing off, or going for long coffee breaks, or playing ping pong or whatever. A 4 day week would be way more effective in these cases. The problem, as usual, is management. They just cannot get over the hurdle that their job is to maximise company performance, not to crack whips.