Interesting. It really has, but I didn't see it before.

I was using Karabiner to set caps lock to control AND escape when pressed independently, something extremely useful to use Vim and command line. This doesn't appear to be supported, unfortunately.

Oh, well then! Looking forward to the first Sierra update, in that case :)

I really did not expect Apple to finally fill this gap that has been around for so many years.

Yeah, sorry I didn't specify. I am running the latest macOS Sierra beta.