I'm now on two completely separate on-call rotations (as a programmer, rather than an IT person proper), and only being paid extra for a fraction of one of them. All this on top of being in charge of way too much code.
Haven't quit yet because honkin' big silicon valley mortgage and all, and if I'm driven off I want severance gosh darn it. Unfortunately my company also can't fire me because like you I'm a single point of failure. I will quit if things end up too annoying though.
Gotta love when your company’s bus number is 0, because one dude in the basement is single-handedly holding the entire business together. The entire c-suite could get hit by a bus and the company could continue to function while new leadership was selected… But that one dude in the basement gets hit, and the entire company’s core function is crippled for weeks.