Good topic and I'm surprised it's taken so long for this to be discussed, as this applies to bodies well beyond Fuji.
Was a long time user of Hasselblad (later 'V' system) 501C/905/205TCC - and the CF's 55/60/80/110 f 2/120Mak/180 - over 2011-2016 I regularly used all but the 110 on my Ds1Mk3 Canon via adapter. Bear in mind all Zeiss CF had an image circle of 6x6 cms tailored to Blad frame, so when using smaller sized sensor cropping was as you suggest but utilised only the central sweet spot of lens so distortion was never an issue. With object magnifcation constant, the Canon sensor resolved 200% higher using Zeiss CF 120 & 180 and without artefacting. They shamed the L series Canon lenses. The truth they revealed was brutal too. Got me into trouble as shots of top Japanese handmade knives revealed surface pockmarks and imperfections that were not meant to exist.... had to defocus and smooth them in post!!
There were also inconsistent focussing issues using the wider 55 mm CF though, attributed to floating elements so not everything converged correctly at all distances. But like all tools, learning via iterration and note keeping was very valuable.
All lenses gave astounding colour rendition, shallower DoF, better bokeh, and microsopic quality sharpness. Leaf shutters synced well with flash too.
Operational drawbacks was their slow operation and as you point out, remembering to shut down prior to exposure.
Bottom line was that they are like unique paintbrushes and pigments, and definitely let one express an idea in a manner no linked proprietary-system lens could, and to those who value it, that is always an artistic advantage.
