For me, mirrorless brings incredible light weight portability (far beyond any film camera or dslr) to extremely high image quality (detail, tones etc). And it brings previsualization back to the fore: I study the subject outside the camera, like I did with B&W LF, because my processing is integral to the result. Minor and Ansel would both like that. When I shot my beloved Ektachrome the job was done with a click but shooting digital the job is done in the darkroom (so to speak). I simplified my digital post-processing tremendously with Lightroom, and further with NIK.
If I was delivering files to clients my game would have to change, but I don't do that.