I don't find the premise or the comparisons relevant.
There are only two MF companies, excepting a few ultra tiny body and lens makers, such as Alpa. These are Hasselblad, and Phase One / Mamiya / Leaf (really all one company).
Even these are very small, producing products in the low to mid thousands a year. Based on what I know about Phase, they are accommodating the marketplace quite well. While pro sales are declining, enthusiast sales are holding steady and even climbing in some markets. The museum, science, military markets also continue and even expand.
As for Hasselblad, I have no knowledge of how their sales are or what their plans are. The pimping up of OEM NEX cameras seems misguided at best, but stranger things have happened.
So, I wouldn't worry about MF. Leica is a player as well, and they seem to be selling every S2 and lens that they can make.
The industry just isn't about megapixels any more, from the point and shoots to backs. There are other metrics that potential purchasers care about. And in some markets, the ones where MF plays, price isn't foremost the way it is in mass markets. The wealthy amateur and scientific/military/museum segment is driven by needs other than simple price/performance analysis, or the availability of glitzy features.
Once film was over there never was a mass market for medium format, and there never will be. But mice do very nicely living almost invisibly among the feet of elephants, who hardly notice or care that they are there.
Just keep in mind that Canon makes more Rebels in one factory in a single day than the entire MF industry makes backs in a year. And that probably includes both gross profit and margin as well.