The toys of the rich become the tools of the poor, when given enough time. Yes, the rich will get all this stuff soon, but eventually, if successful, they will become so cheap everyone will have (or be able to have, should they wish) one.
Anyone who is enthusiastic about something might overemphasise its abilities, especially if they are trying to sell it. If you know that you won't get quite so offended or surprised by these pitches not precisely panning out in the long run, saving us from having to read the age-old faux-outrage responses again and again and again every time someone attempts to introduce a new way of doing things.
The petty ramblings of billionaire technologists are allowing you to read what I'm writing, so I'm not sure you can call it mostly drivel...
It would help you to read how and why vaccines work before arguing against their efficacy. As it is you are reinforcing the "science-ignorant anti-vaxxer" stereotype with such childish errors. Actually, that's pretty mean, as plenty of children understand how vaccination works, having been taught about Edward Jenner and his work in 1796, and the subsequent discoveries and developments in the field of immunology.
Or are you happy sounding like an under-educated person, cheerfully spouting abject nonsense like some massive beacon of ignorance for all to see?
It's never irreversible, the question is will we be around to (and capable of) stopping it? And if we are, what damage would the changes in climate do to humanity?
If you can't see the one particularly interesting difference between millions of years ago and today, you really should sit down in a quiet room and think.
And the answers are:
a) Yes
b) Yes
c) Yes
to a very acceptable level of accuracy.
That says absolutely nothing about them downgrading *anything*. It merely states that some devices might not be compatible (and so don't get the upgrade at all), or be missing certain hardware support and therefore unable to make use of all Windows 10 features. Nowhere does that mention downgrades or time-limits. They have to have these disclaimers as otherwise someone with an edge-case piece of hardware which simply can not run Windows 10 can sue the shit out of MS for not getting Windows 10. If this confuses or surprises you, it's not a problem with MS, but with your understanding of liability and hardware requirements.
We do know - you have chosen to not know.
The science is settled, and models are not required for it to be settled - that is just a criterion you came up with.
"Ninety percent of baseball is half mental." -- Yogi Berra