This reminds me of the record industry. Big boom when there was the switch from vinyl to digital -- CDRs. Windfall times with people re-purchasing old dead catalog in a new physical format. Gotta hear Dark Side of the Moon on digital, mahn! Physical Graffiti has been off the charts for 10 years -- now it's tracking again, on CDR! A decade or so later the record industry was crying that sales were down when that format changed again -- this time not in the record industry's favor but in Apple and other's favor. The fact was, was that those sales numbers when digital formats arrived were unsustainable to begin with, the product of an era where consumers were willing to spend to transition to a new and better technology. It worked in the record company's favor the first time. But it came up tails for them the next time.
So it goes with the camera companies. The record lables are still around, most/many of them (I don't keep tabs...). They found a way to survive. Scaled down. Merged.