Comment by lmm

Meh. Decades ago most universities realised it made sense to separate "run the IT infrastructure that the university runs on" from the CS department, and after that the university IT department followed the same trajectory as the IT department of every other large institution. It doesn't really make sense to run your own email servers any more if your core business is a paper merchant or steel mill or whatever, and it's the same for universities.

I'm sure the same thing happened with e.g. electricity - at first people in the physics department ran their own generators, then at some point the university was using enough electricity for day-to-day stuff like lights that the main generators moved to being operated by the facilities department, and nowadays the university just gets their electricity from the local wholesaler like every other big organisation and probably doesn't have a whole lot of transformer expertise in their maintenance department.