Great resource. I've seen a few "you don't need jQuery" sites before but they were more general; actually listing commonly used methods and how to do them without $ is a much nicer way to present it.
A couple of the things though that make jQuery really nice to use are:
a. Clean syntax that's pretty much known by everyone across the JS-sphere, including chainable methods.
b. Events.
c. Promises.
d. Cross-browser compliance (much, much, MUCH less of an issue these days, and hence "what version of IE are you targeting").
But yeah, in terms of DOM manipulation etc, I usually go native anyway.