I’ve got an Arax and Pentacon Six that both work, but my main reason for posting is to second what one other person has hinted at, which is that there are a lot of superb lenses in Pentacon Six mount, not just the 50. And these lenses are superb in the realm of every lens every made, not just the realm of cheap lenses, which is where they fall in terms of cost.
I’ve used them adapted to my Contax 645, but adapting them to a non 6x6 format just handicaps them, so I abandoned that practice almost immediately. ”Most reliable cameras ever made?” No, but they’re reliable enough, especially an Arax, which isn’t all that expensive in modern camera world, and the renderings from the CZJ lenses are not, overall, like things you will get from anything else.
So, in answer to the OP question, yes, the lenses are good enough to merit buying the bodies, even with the potential pitfalls.