>And yet it was Sony that hurt their camera market shares the most, action cams are a nieche product.
Mirrorless/DSLRs and compacts have been further niche-ified by mobile phones. Many who previously would step up from compacts to a Mirrorless/DSLR have stopped and just use their (now vastly improved) phone cameras.
And mirrorless and DSLRs are maybe more of a niche than action cameras (which tons of average Joes buy, not just extreme sports fans).
Canon and Nikon make more than half of their revenue from industrial or healthcare products. They sure wished for more profit on the customer business as well, but that's not their core competency anymore.
