Windows 10 market share is actually doing quite well, even despite the nonsense that it's "spying" on you, stealing your personal data and somehow going to lock you out of your PC.
Nonsense? The notion that the NSA was spying on normal people was also deemed complete nonsense and the realm of tin foil monkeys... right until Edward Snowden blew the whistle, of course. I don't know, I was never one for conspiracy theories, but I do see the danger here.
Some are just too blind to see or prefer not to notice.
The tools are already there, together with users who seem to be letting a private company transfer *undisclosed* data from their own *Personal* Computers in a completely unregulated fashion. Personal as those being computers that have their pictures, home made movies, documents, browsing history, love letters, divorce papers, etc, etc... If you don't see a problem with that, I don't know... Eventually someone is going to fall to the temptation of using that same data.
Microsoft is also already pushing ads into their Start Menu, disguised as 'suggestions', of course.
Could you imagine just a couple of years ago that such a think would actually happen? Microsoft's flagship OS becoming adware?! Microsoft itself has already admitted that it is going to sell your data to 3rd parties. Not if, but when, if it's not happening already.
As for locking people out of their PC, come on, it's obvious what Microsoft is aiming for here. They want to sell Windows as a service, as software rental, so the money keeps flowing in every month or year or whatever. And what happens if you don't pay the rent? I don't know how it is in your part of the world, but in mine you get evicted out of the house you're living in.
That's why Windows 10 is, according to Microsoft itself, the last Windows version ever. There will be no Windows 11, just a continuous stream of upgrades. And you think those will be free too, that Microsoft will just turn their back on the revenue they made selling new Windows versions? I don't think anybody is that naive.
As for market share, according to my own data, Windows 10 is now on almost 30% of all Windows computers, with 47% of users still on Windows 7 and about 18% on Windows 8.x. Not too bad... until you remember Microsoft is actually giving Windows 10 away for 'free' at the click of a button. And even though the percentage is very slowly climbing, it kind of stalled once it reached 25% in the first couple of months.