Best example of what you've said is probably the XPan, which shoots either 36x24mm images or 65x24mm panoramic ones onto 35mm film. 65x24mm is about the same you'd get by cropping to top and bottom of 6x7 behemoths and the image circle easily rivals modern 6x45 systems.
120 film is great. It is still relatively inexpensive, is essentially the same thing as 35mm cut larger (so you can think of medium format sensors having same pixel density as 35mm or APS-C) so the lower magnification while enlarging is helpful in minimizing grain size while maximizing pretty much everything else. And you can use it on a lot of different cameras, ranging from 10$ plastic boxes made by Soviets to 5000$ Hasselblad systems, 6x45 modern cameras with autofocus to 6x17 cameras with no automation at all.
120 film is great. It is still relatively inexpensive, is essentially the same thing as 35mm cut larger (so you can think of medium format sensors having same pixel density as 35mm or APS-C) so the lower magnification while enlarging is helpful in minimizing grain size while maximizing pretty much everything else. And you can use it on a lot of different cameras, ranging from 10$ plastic boxes made by Soviets to 5000$ Hasselblad systems, 6x45 modern cameras with autofocus to 6x17 cameras with no automation at all.