That's not how my on call setup works. I need my phone and my laptop, and I need to be able to respond within half an hour or so. The changes I have to make are

That's not how my on call setup works. I need my phone and my laptop, and I need to be able to respond within half an hour or so. The changes I have to make are in code that then goes through CI and a load test before hitting production, so there's no "you have 10 seconds" stuff. We don't have anyone on call in the sense you mean, and I've never seen it in the wild. If they want someone right there all the time they've paid them to be in the office where they have proper access to critical systems. When I worked in a medical environment that was what we did, and those people got paid very well for doing overnight "tech support" ... they were bored enough that answering random IT questions seemed worth while for them.