>>4235669Unless you plan on using it for work or you want to print poster sized photos to be looked at from up close, a high res full frame body like an a7r something, a z7ii or a Panasonic S1R on the cheap is going to give you a comparable image quality with much, much more convenience, more available lenses, all while being significantly cheaper.
Even in the off chance you have enough money and not enough sense, try shooting some film with a medium format camera, see how inconvenient, bulky, heavy and non ergonomic the whole process is, and know that adding a digital back is going to make some things better, like exposing scenes properly, and some worse, like having to also have an expensive digital back attached to the camera.
Working with a Phase One XF for 30 minutes last year was enough for me to stop wanting one.