Long time since a camera changed the *quality* of my work.
Leaving aside the most important parts (content, story, location, light,...), and speaking about technical aspects:
- Lens look is by far #1, and this is where some MF systems and Olympus 4:3 do IMHO shine brighter than pretty much anybody else (leaving some Zeiss wonders aside),
- Shooting experience remains key (EVF vs OVF,...),
- AF is IMHO the last remaining pure "tech" spec that can still change something and enable photographers to achieve "new" things that may result in "better" photographs (I know nobody cares about those monster cameras any longer but the AF of the D5 is the closest thing to raw magic).
- More DR did change something for some years, but we are now at such a great level with the latest bodies from most brands that this is also pretty much a thing of the past,
- At this point of time, more pixels don't change anything, zero, nitch,
Cheers,
Bernard