I went through a rough period last summer where a project I was involved in was a complete disaster. I basically spent 24×7 terrified that a new "emergency" was going to roll in on my phone via email with a stakeholder telling me how this new issue was ruining their life and how disappointed they were; an issue which I was expected to deal with immediately. After that summer and to this day I keep my phone in "Do Not Disturb" mode 24×7 and treat it as a passive communications device that I only check when I want to, because I have literally run out of notification tones on my phone that don’t send a burst of adrenaline through my body upon hearing them.
This is even after that project is over. I feel like it permanently damaged my brain and my ability to deal with stress.
I have used smartwatches that notify you when an email comes in by vibrating on your wrist. I view these as modern-day human "shock collars" where the shock collar beneficiary is actually not you, but your employer. I actually warn others against falling into that trap of wearing a "shock collar for work". Having your arm vibrate the moment an email comes in is not healthy.