The Someone Else’s Problem Field around infrastructure is, ironically enough, a measure of infrastructure’s ubiquity and success. You don’t think about infrastructure because you don’t need to. It just works. And when it doesn’t, there’s a phone number you can not bother calling, because they’ll only put you on hold anyway, and by the time you get through it’ll probably have fixed itself, so why bother?
It’s this infrastructure that is unseen, because it is infra-structure, it is under the structure. And when you start thinking about this massive web of technologies that keep you alive, the only interfaces we have on a day-to-day basis are tap, turn, flush. Everything else is hidden and unseen.