I am very new to large format photography and most of my work until recently has been on Hasselblad. However, I became interested in macro work and dug out my old 35mm system. I don't see the point of photographing something less than 36mm long on anything larger than 35mm. So I think it's down to fitness for purpose. My 35mm. landscape shots are fine, equipment easily carried, very convenient etc., but my Hass. pics. are very,very nice but the gear is not quite as transportable, and L/F, well you need a pack-horse and a lot more time, but the pics. are very, very, very nice. I now use 35mm, 6x6, and 5x4 depending on subject choice. You don't see L/F at sports events these days so I think it's down to the type of photographs you take and the sort of photographer you are. I'll stop now, people will be getting bored....
Big fleas have little fleas upon their backs to bite 'em, and little fleas have smaller fleas and so ad infinitum.
PS. It's not the equipment that matters, it's the end result!