(the other author) It is definitely worth noting too that this was first proposed and seriously discussed well over a decade ago now. The subject selector is i

(the other author) It is definitely worth noting too that this was first proposed and seriously discussed well over a decade ago now. The subject selector is inherently less powerful than the original (has) proposal, but even that got pushed out to selectors level 4 and (if you keep an eye on the lists) there is a very real possibility that it may get shoved to selectors 5. There are legit reasons for this, don't get me wrong - putting this natively in the browser opens a different can of worms. With Hitch, you "opt-in" and have the option to choose the features that you need. This means that the vast majority of sites can benefit from things that are problematic for the paradoxically hard cases (like the HTML living draft, single page edition with 135k+ and counting elements) -- and we think that is a good thing :)