Lenses/cameras ratio is 7:5
Canon produced 70 million lenses per 50 million cameras. That's 7 lenses per 5 camera bodies, or only 2 additional lenses per 5 cameras.
It confirms that most of the owners of the interchangeable lens cameras never change their only lens. At least 60% of the camera owners never own the second lens. As the lens-buyers are likely to buy more than two lenses (most of them, who I know, do), there must be even larger slice of non-buyers. Let say, if lens-buyers own 3 lenses on average, then non-buyers are close to 80%.
In other words, most people don't need an interchangeable lens camera (or can't afford it). They don't need a bulky DSLR, nor a less bulky mirrorless, nor a pricey Q. They pay more because they hope to get a better camera which takes better pictures, but all they get is a suboptimal tool, and paying more for the AnyBrand's economy of scale. The most consumer-friendly camera is compact, with a high quality fixed glass, a good sensor. Always in the pocket and hard to misuse. That said, I still like to use DSLRs and absolutely love the optical viewfinder.