Or my talk therapist girlfriend, for whom working from home still means having phone or video appointments starting and ending every hour. Though at least she can take a short break if someone no-shows (most of that time is for doing notes).

I suspect most people working from home have some opportunity to take breaks here and there, though. I'm aware of certain professions with invasive monitoring (I've seen nurses that work for pharmaceutical companies report this), but it doesn't seem to be particularly widespread. I'm not familiar with anyone in my personal life who have an expectation of immediate response to superiors (though on the rare case the CEO contacts you, you should make sure to get on that pretty quickly ... but that's why I get email on my phone/watch).