That has also been superseded in the digital realm. I can use a top DSLR from the last decade to blow film medium format cameras away under most conditions, especially in low light. If I just use a digital medium format camera, it invalidates almost any rationale for film medium format (there is a minor, minor argument to be made about depth of field when the lens is wide open).
Large format can squeeze slightly more resolution out of an image, but the ability to actually use that extra resolution is rarely satisfied. Again, a MF digital subs in for almost every conceivable use case.
The reality is that people do this because it is fun, or a challenge, or for a feeling. Basically, its interesting. The technical excellence of the 'end result' is secondary.
There's tons of things that people do that don't make sense from a purely pragmatic point of view, and that's what makes the world so much more fun to live in.
But these cost several thousand dollars, due to them still being relevant for contemporary professional applications. Medium format bodies can be found for hundreds of dollars on eBay. Even at $1/shot, if as a hobbyist even if you shot 4 rolls (48 shots total) in a weekend, you'd be shooting that much every weekend, every weekend straight for years before a top digital body would break even for you. And you would have more fun and a more meaningful time due to the more deliberative process.