PS: I also don't get the obsession with market share. As if a bigger market share means that the products by that company are better. They are cheaper. That's it mostly. That's why more burgers are sold than lobsters, and more Honda Civics than Mercedes S-Class cars. Is Market share really the only thing Canon fans can be proud about? Oh, and of course: colour science. Anyway, I'm out using my 7DII. Bye.
Market share gives people something measurable to talk about. Yet people still manage to argue about it on line. I can't see any further reason to be interested in it as a consumer, maybe even not so much as an investor. If a company is faring so poorly that it might go out of business soon, then I probably don't want to buy more of their stock or buy new products that might not get serviced in a few years. Otherwise, it's just a number that is worth maybe a quick nod each year.
If it is a tribal thing, (like the people who say they are on ships and might jump off them), then there's the bragging rights of my tribe's brand beats yours, then I can't relate. My Sony TV is in the living room. I have a Samsung in my bedroom. I don't change my personal identity when I walk from one room to the other. Both brands may be down in terms of TV market share from when I bought those sets. That hasn't affected the picture on either one.
I recall a few years back when pundits were (yet again) predicting Apple's demise as iPhone market share continued to fall, and Samsung's share was stable at best. Someone pointed out that together Apple and Samsung could account for something like 135% of the profits in that market.