Earlier quoted context omitted.
Except that sublime does all of that, supports plugins written in python, and doesn't screen tear, and leaves me some RAM for other things
I wanted to agree with you and write a snide remark about Atom, but then I checked RAM usage of an empty Sublime Text 3 instance on 64 bit Linux, and it was at about 136 MB, so there's that.
But the point of the article is the bloat as you open larger files, which gets much larger when you use a DOM to do syntax highlighting.
I have (and unfortunately still have to from time to time) open massive log files - in sublime / vi / nano they open fine (even with syntax highlighting), but even on my workstation Atom and Code fall over.