It used to be that the first thing I'd reach for when building a prototype was JQuery off a CDN, but now I find that more and more of what I use JQuery for is built into the browser, and in my last few prototypes I've just stopped including it at all because I don't need it.
Nope, I didn't hear anything further on it. Still seems like an interesting event to me, though finding time might be hard. (FWIW, we do similar things within my employer all the time.)
http://caniuse.com/#search=classList
It used to be that the first thing I'd reach for when building a prototype was JQuery off a CDN, but now I find that more and more of what I use JQuery for is built into the browser, and in my last few prototypes I've just stopped including it at all because I don't need it.