FYI, I've only broken out the Nikon once over the holiday to do a family portrait. All my 50mm stuff has been with the Sony a6000, if only because of the size, weight, convenience, and the fact that I'm not losing all that much in terms of IQ. It's at least as good as my D7100.
Here's one at ISO 6400, denoised and grain added back in LR finishing for effect.