I agree that part of the fun is to make pictures with an odd camera that's not everyone else is using. I only have a tech cam now, but I'm thinking about getting an old Hasselblad H1/H2 for my H-mount back just for fun. A friend of mine has several legacy cameras which he can use with his V-mount 22 megapixel back, it's fun and unique looks can be had.
Anyway, the key issue is of course that new MF gear, mostly the backs, are so offensively expensive and the actual image quality difference is no longer huge. This is the main reason why these discussions exist. In the film days the quality difference was much larger and the price difference much smaller.
As long as MFDB makers can motivate the huge difference in price towards professional photographers they have their market and all is cool. If that is possible a few years from now I'm not sure, and if the market shrinks further then we might have a situation when medium format backs will be as common as scanning backs are today, i e speciality equipment for reproduction photography, industrial or aerial photography for mapmaking.
If the pressure could lead to a shift towards more affordable digital backs I'd be happy, but it seems more likely to me that we'll rather see further price increases due to higher end products (to keep distance from smaller formats) and possibly smaller market. I think the DSLR-like bodies can take on a different direction (Leica S and Pentax), but I'm personally more interested in digital backs as this is needed for tech cams and this is what makes MF fun, being able to use it on different camera systems.
I as the amateur photographer I am will hang in there as long as I can motivate the cost.