>>3480328>the details would be incredible, but what are the downsides?
Extreme contrast and limited dynamic range. Special low contrast developers needed to get something usable.
Point is, very few lenses are *that* good, they cost fortune, and you're bound to a tripod with mirror lockup to exploit the extra potential.
At this point, might as well shoot a 100$ medium format lens over a 1k$ 35mm format one, and get better resolution with a normal film.
Also film size and cost scales linearly, very few people would obsess over maximum sharpness and special films on a format, when they can just cut a bigger sheet of film and get better results this way.