On the subject of mirrorless or not... As a child of the 1970s, I held medium format anything in the highest regard.
After all, the Apollo astronauts used big honkin' customized Hassleblads anchored to the front of their spacesuits and took all of those thousands of gorgeous moon pictures that NASA airbrushed the alien craft out of. ;)
The technical attributes and specifics: these are roll film products, producing 2 1/4 or 6x6 cm negatives or slides. We're talking absolutely velvety smooth negatives and slides with no visible grain.
As a kid I had the absolute highest respect for these types of products. But they were always out of my reach. The basic camera bodies were always priced like a good used car even as late as the 1990s.
Anyway, on a lark I searched Ebay for products like:
Fujifilm medium format
For example, I was once quite interested in the Fujis, but they were once priced well over $1000 and I didn't see using it enough to justify the cost.
Now, I could pick up one of each line if I wanted and not feel terribly guilty about it.