I was on call 24/7 for years. It's been a long time since I had to deal with that (with a slide into a related career rather than changing careers) but I will never forget how terrible it was. I wasted what should have been my best years on that shit.

Now there's only one person at work who has my number. He doesn't call except for the one time I forgot to put my day off on the calendar. My work apps are paused at 5pm and all weekend. I only get alerts on my computer. However, I still twitch sometimes when my phone goes off after hours because it was a learned and deeply reinforced response for so many years.