I do not care about quantum steps or even incremental steps better - if it performs on the level of the best MFDBs in terms of IQ and ISO, then the form factor for me is the really killing argument.
Somehow my dream equipment carves out of the noisy darkness:
P45+ and a Tech Cam (maybe Alpa) with 1 or 2 great Schneider lenses
S2 with 3 lenses - a good WA, 70 and 180
Can process all in C1 then, do not have to fight with a H3D or H4D or Phase camera, leaves me alone without any Phase or Hasselblad glass manufactured and designed in Japan or elsewhere - which I all do not like too much - sorry -
And am done