[sayrer]

This is a pretty fair comment, but also not scratching the surface in some ways. Firstly, any decent boss will give you days off if some gnarly on-call stuff happens. Anywhere from "you can come in at 2pm and leave at 5pm" to "take Monday and Tuesday off, no one will track it". This is because they know it is a retention issue.

Secondly, there is a cultural divide sometimes. Generally, iOS programmers aren't on call, because they can't ship anything in less than a day or two. So, you get this phenomenon where they say "I'm an expert in Apple user interfaces" (a fine thing to know about!), but everyone resents them, because they are not on call.