Re: "is on course to become the world's default desktop OS over the next 2-3 y"
"Windows 10 user data slurping and continuous upgrades really pissed a lot of users."
Perhaps most of us technical people. The average Joe Sixpacks out there are oblivious to the 'telemetry' slurpage. People I interact with (end users) have never mentioned the whole thing when served with a new Win10 computer. Equally the same end users are buying Android phones en masse.
"And it's still interesting that despite having being first offered as s free upgraded, and then employed any malware tactics - but those that would have had Nadella jailed - to install itself surreptitiously, it's still NOT the world default desktop OS..."
I think the people who updated to Win10 were mostly home users and some users at smaller businesses. I sure as hell couldn't be bothered to upgrade any of my clients to Win10, because while the update was "free" it would still require lots of work and in the end Win10 wouldn't run the users' Office and other software any better. The Win7 death date has been pretty far in the future so more likely the computers would be replaced before that date anyway.
Being 'free' did help Win10 market share at home users because people usually like the notion of having free stuff, whatever it is. Those home users are also more likely to invest in the Store app.