In my experience, it seems like people do whatever they want. Block off an afternoon for appointments, to drive their kids somewhere, or just “heads-down” time

In my experience, it seems like people do whatever they want. Block off an afternoon for appointments, to drive their kids somewhere, or just “heads-down” time where they’re not responding to chat. As long as people have some kind of work to show each performance cycle, and they don’t disappear for extended periods without warning, nobody seems to mind. A 4-day work week would formalize this and reduce the stress, though. Some companies allow it: for example, I know google engineers who work 80% time (with a corresponding pay cut). 80% of Google pay is still plenty for most people.