> A modern server can be power cycled remotely, can be reinstalled remotely over networked media, can have its console streamed remotely, can have fans etc. checked remotely without access to the OS it's running etc. It's not very different from managing a cloud - any reasonable server hardware has management boards. Even if you rent space in a colo, most of the time you don't need to set foot there other than for an initial setup (and you can rent people to do that too).
All of this was already possible 20 years ago, with iLO and DRAC cards.
Yes, that's true, but 20 years ago a large proportion of lower end servers people were familiar with didn't have anything like it, and so a whole lot even of developers who remember "pre-cloud" servers have never experienced servers with them.