That's a good question to an angle I hadn't considered. The in-office people are strict 8 to 5ers and none of us work from home that often - just the random voluntary thing when something is interesting. The remote workers work more hours to be certain. Most voluntarily with some of the tech people being roped in on weekends. The core in-office engineers have spent years insisting on strong work-life balance that sadly has not propagated to other teams as much.