MFD isn't going anywhere. Physics are still physics and Medium Formal can therefore do thing 35mm can't. Granted it is a VERY specialized tool for extremely high end portrait pros who can charge for high end work and high end cameras. Medium format will never achieve the market penetration 35mm will. But thats why they are priced so much higher because they wont ever produce in large volume.
Yeah, with camera sales in general going down, it MFD likely isn't going to get wide spread any time soon. Although, I do think the likes of the GFX100/50 and the X1D II are making things a BIT more reachable by common folks. A BIT...lol.
I do see the coming Hasselblad digital back, the part of the new CFV II 50C digital back coming out, as possibly being something that can introduce more wide spread (a relative term for sure) to more of the masses with disposable income:
Hasselblad V System new Products
The old 500 V system series of camera are out there by the ton, and aren't really that $$$...and it seems 120 film is having a bit of a resurgence from what I can see....and being able to pick up one of these cameras with lenses for a very reasonable price, could set you up to start shooting in an interesting square (6x6) format which is new to a lot of folks.....and then save up and get one of these backs and voila, you are in the MFD game for MUCH less than the Phase one or the Hasselblad H system beasts.
I"m actually kinda hoping that this is the case...if that new back comes out in the $5K range...with scrimping and saving, I could get one of these and really have a great companion to my Canon FF gear..plus I have that film thing I can fall back to for more variety.
I've actually been VERY surprised at the amount of content on YouTube on not just film, but MF film and cameras out there.
So, yes, while likely never to be as main stream 35mm digital, it does seem to be creeping into consciousness more and more of those really into photography.
As I understand it, in high end product commercial photography, fashion, etc...MF is highly prized and used, so perhaps it might be a part of that higher end, higher dollar market Canon might some day shoot for?
I dunno, likely wishful thinking, but interesting to discuss.
I mean, if eventually, I get a R5 and put my 5D3 back into back up mode for that, and have my 501CM where I can shoot 120 film and Digital MF there too...man, I think I'd be set as far as covering as many types of photography (and some video) as I'd want for quite some time.
While I'm at it....I'd also like a pony.