This. And do they really expect employees to answer e-mails outside of working hours? To me e-mail is "slow" communication - if you need an answer right now, use a different channel.

I suspect yes. You may not see it in your industry, but I see it a lot in the creative space. Anecdotally, I know there’s an expectation when working for a video production company that you are constantly available to react to clients. And that since much of the work is contracted to people who work odd hours, being a producer is an always on kind of job.

As for how common it is? dunno, but there was a very funny (sad?) music video that hints that this is fairly widespread phenomena, for young office workers. Quarter Life Poetry, “Circle Back”. One of the final scenes is the narrator being unable to get away from the grind even at home.

https://youtu.be/XXt1-qEjKlE?si=ps3iSQZBVYMweN83

edit: warning slightly crass

Software developer here, also doing development support work at times. Still, in the last 20 years it never happened that I got a call from work, despite emergencies being pretty common. As it should be, in countries with strong employee rights.