No doubt in the '40s, '50s and even possibly '60s most professional photographers shot MF on a Rollei. After that they nearly all used a Hasselblad. Certainly all the guys I knew used Hasselblad when they shot MF – as did I. There really was no choice.
Later the big Mamiyas began to muscle in on the scene. Then came dig****....
But all this is rather a long way from the original topic which was about MF on a very tight budget.