The day you speak of is never coming,,,,
And all the rationalization in the world with never overcome the huge increase in image quality from MF (6X9) to 35mm film. Why wait until that projected fantasy time in your mind when the film is no longer available, and then become fanatic about all the time you could have enjoyed superior image quality?
It's not my place to understand your weird logic, but that doesn't mean I can't (somewhat gently I might add) chide you for your wrongness.
And, I don't make the connection between buying a Leica and buying MF. No leica in the world, with whatever leica glass will shoot a 35mm image that will equal, or come close to the quality of a 6X9 frame from glass the likes of Fuji's EBC.
But that's OK... We've all made huge mistakes in our life that we have later regretted. I got married once.🙁