Film cameras uses 36x24mm. So when manufacturers decided to drop film for digital, they know that FF sensors then are expensive and out of reach of most consumers. So are APS-C a product whereby it started off with just the intention to attract mass adoption to digital to recover R&D cost? If so, does it mean that when FF sensors / cameras become affordable, it will also mean the demise of APS-Cs?
For example, if you can have an affordable FF M9, would you still want a APS-C M8? If you can have a FF NEX, would you still want an APS-C NEX? If you can have a FF DSLR, would you still want an APS-C DSLR?
Are APS-C a product that manufacturers cleverly made use of to push for mass adoption, recover R&D, buy time for FF sensor to mature, etc and unknowingly created a new market segment. Or are APS-C a genuine attempt by manufacturer to offer something new to the market?
Will the day come when cameras all go back to the 36x24mm format?