Which is almost certainly horsechit.
Every vulnerability in the NT 6.1.7601 codebase (that's "Windows 7 Service Pack 1" to users) that was discovered so far for 8 years has been patched successfully.
Now with Windows 10 adoption suffering, and sales missing their targets like crazy, and the "billion installs" milestone receding over the horizon, suddenly Microsoft discovers vulnerabilities in Windows 7 that they can't patch? Oh Really??
Color me intensely sceptical.
> Frankly Win10 is much better,...
"Better" is subjective.
Things like internal security architecture are objective. And I agree that Microsoft has learned things over the years that make it EASIER to fix the vulnerabilities in Windows 10 compared to Windows 7. No argument.
But... "impossible" to fix?
Nope, sorry, I just don't believe it.
Microsoft knows that in Jan 2020 they will have to pound a stake through the heart of Windows 7. And I have no doubt this is just getting the huge number of Win7 users "softened up" for that stake. I would bet a $20 donation to FreeRepublic.com that before Jan 2020, Microsoft announces at least one huge, scary, "fatal vulnerability" in Win7 that they refuse to patch. They did that with WinXP at the end of extended support, and they'll do it again.
While some vulnerabilities could be addressed, there are others that can’t. Starting with w8 new securities tech was integrated at the kernel level to make the OS far more secure. w10 has gone even further. To fix 7 it would have to be fully rewritten.
That said MS is moving it monetization model to Azure so they have no interest in w7.