In my experience it's fine to stop push notifications for email/chat messages after hours and "call me" if it's an emergency. I often get 'urgent' emails and chats that aren't really urgent, but people rarely want to call you unless it's something truely important. Nor should people send email for urgent generally, I think that's expect a reply within 24hrs channel type environment.
I feel for society we need stinger rules to balance work/life. A great one would be something like like for employees under $200k it's the employers responsibility to ensure they are working their 40hrs or pay overtime plus right to claim bad extra hours on leaving a job. Add to that some serious overtime rate minimums like 2x or 3x for weekend and out of hours.
Ultimately we should aim build a society for good living and a productive economy is part of that, but not more important.