Article demonstrates complete lack of real world experience
I have to agree with the question by a previous commentard as to whether this is a school essay.
The article shows utter lack of any real world experience (at least of any larger corporate environment).
"Now for servers. At the physical server level, life is reassuringly easy. You are either Intel-based or you are not."
This is probably the most glaring (but by no means the only one) example. Take just about any large corporate environment and they will most likely have multiple architectures in their infrastructure.
All in all rather simplistic, rose-tinted view that doesn't really even start to address anything that happens on the datacentre level.