The idea of a medium format Sony a7s II isn’t really a completely farfetched one when you consider how photography and technology have evolved hand in hand. For years, medium format photography has been stated to be better than 35mm photography–at least in terms of the analog film world. In the digital world though, the two tend to be able to hold their ground with one another due to algorithms, processors, etc. The medium format world has also always been about getting higher megapixels, more emulsion, more details, more surface area, etc. In the film world, it results in grain that could look less unsightly and more pleasing than film typically allows.
So with that said, why can’t a medium format sensor have less megapixels and an incredibly clean high ISO output?