For me it’s easy - I need to print big (3meters x 2 meters), for gallery distance viewing. And 100 MP is a minimum for me - 400MP would be even better, even if I do composits. In any other use case 35mm is more than enough for dellivering on 99.9% of photographic needs, if you don’t need to print larger than A0 or if the internet is your display medium. Last 35mm camera I had was a Sony A7r2 with Zeiss Otuses, Hartblei Zeiss TS and Sony and Voigtlander lenses, and I still miss the (output)aestetics of some of those lenses.
But the GFX 100 with some GF primes and Rodenstock lenses serves my printing needs a lot better. For additional aesthetic options (colour, rendering, microcontrat, highlights handlingand maybe even some additional resolution) and added portability I’m considering the X2d with some of the newer, lighter xcd-V lenses.
If I decided to stop big prints, I would go for Leica SL and Leica primes, and maybe some Sony with Voigtlander and some of the newer Canon ts-e lenses, as the good enough option for me - and I would be 100% sure that gear would not be a limiting factor for my visual output. But I’m still printing big, so 100 MP MF is the only game in town for me (the 150MP MF one, I cannot afford it

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