The largest strike against the Bronica is that the last systems (SQ) uses electronic shutter. This is great, as they are likely consistent and time-accurate, but the electronic shutter is unrepairable so a problem will yield purchasing a new lens.
This is a myth. I service those cameras and lenses.
The lens has an electric (not electronic) shutter. A shutter that is 99% mechanical except for a solenoid, a couple of simple passive components, wiring, and contacts. The actual electronics are on the body.
Everytime i've found issues in a shutter, the cause has been mechanical, specifically lack of cleaning and lubrication.
The body is electronic, yes, but the electronics are extremely simple and reliable.
I remember in the distant past there once was one with a thin plate that went between the tripod and the camera and had a long, flexible shaft for the flag. However, that was cinema related...