How often would you shoot that scene like that to get a useable image? Never… IMO a test of how far you can push the tech and its an extreme test, interesting but extreme.
There is barely anything to recover from its so under exposed, basically a black image, even tho the sony resolves more +5 is ridiculous, I would never send something like that out.
Ok expose for the highlights but there is nothing to recover the blinds have no detail to show, ok if it was a landscape in the background and the blinds were open to let more light in…
Either way if you were shooting this commercially you would bracket with both cameras, you would never shoot one image, to expect the camera to be able to resolve that is just silly and again extreme. Once you bracket the difference becomes much slimmer.
Yes from playing with the raw file the sony is impressive and does open up more possibility but again, I personally don't shoot like that and also wouldn't send something like that out, although in a pinch is definitely useful.
I think tho these technologies start to render the actual skill of the photographer as useless and you can rely on the tech too much as in ye its fine il sort in it post. I don't like that attitude.
I understand your frustration Jrista, I think your a great contributor but there are ways and means of getting around the problem, just enjoy shooting instead of fixating on a problem that there are answers too