I have to highly, highly disagree given the context that in most SaaS software companies operations are going to be on-call, and horrific on-call nights can't h

I have to highly, highly disagree given the context that in most SaaS software companies operations are going to be on-call, and horrific on-call nights can't happen if you're not on-call. Even in the best of companies (minus organizations that have the massive resources of a follow-the-sun on-call rotation) being on-call means tons of interruptions during one of the most important times you need to not be interrupted - sleeping. What you may be observing is that the operations folks that make it to a later stage in their career that have not burned out permanently have adopted / maintained a mentality of simply not caring about work as much as possible.