I believe this is an option for a backlit keyboard on some of the models.
Prior to this machine I'd been using Mac laptops back to a G4 PowerBook (2004) to a 2011 MacBook (last release pre-retina display). While my current laptop isn't as polished as an Apple, I wasn't looking for one. The screen wasn't a step back (I know from screens I've published in peer-reviewed journals on them) and the keyboard better than the MB Pro -- the speakers are about as good. The major negative is the mic placement on my machine -- beside the trackpad. I think this is a quirk of the model I bought. The touch pad is really nice, more sensitive than the MBP and flush with the body (a nice touch).
I was generally disappointed with the 2011 MB Pro on battery/power issues -- the battery life wasn't great and it ran too hot most of the time.
Buying a System 76 laptop was the last step on a long road from being an Apple fan who played around with linux to finally embracing linux as good enough for everything I do now. There's a nice touch here or there that I miss or some quirks that I know exist because I've left the walled garden, but I am glad not to be forking over cash for Apple's corporate shenanigans and to be supporting a small company.