Re: Privacy? How about basic usability?
"And which of these do you use?"
Check out the Steam Library. Compare the size of the Linux one with the Windows one. Most of the newer ones use cutting-edge stuff including DX11. WINE stinks at cutting edge. Fallout 4 happens to be one of the most prominent. We can probably also throw in Metal Gear Solid 5 and the Final Fantasy XIII trilogy.
Put it this way. If Linux gaming really were all that, (A) Valve would be having no difficulty getting mainstream developers to code for Linux to get away from Windows' thumb, yet you have developers like Bethesda Softworks (who made Fallout 4) going on record saying that developing on Linux is too mercurial. And (B), you'd see the professional gaming circuit, who thrives on the cutting edge, and who do it for a living, using Linux gaming boxes to extract the last bit of performance out of their rigs. Yet we don't see that.
"Not forgetting also that updates on doze require a reboot for making really stupidly minor updates to the system."
That's what I meant by monthly. Most of them update system components, which is why they require a reboot. About the same thing happened when I was on Xubuntu (yes, I tried Linux firsthand, and I didn't like it). As for rebooting, consider the target audience (Joe Stupids who don't understand the concept of rebooting). If they don't reboot, they can get pwned and Microsoft gets the blame for it. Sounds like a case of "damned if you do, damned if you don't," only they have more "Joe Stupid" Windows customers than sophisticated ones, and the latter tend to have enterprise contracts with different rules.
"If your machines are really that bad, you really need to get off Windows."
Wish I could, but like most people the software I use everyday has no analogue anywhere else meaning we're kinda stuck here. That's what you don't seem to understand. When someone is stuck in a leaky boat in the middle of the shark-filled ocean, there's really only one option for you. Such as it is for most people: there are no alternatives.