It would be if "not providing platform specific software updates on older operating systems" meant "won't work on anything older than windows 10".
Luckily, it doesn't. Clickbait sites and dumbass anons love to misreport non issues.
BTW, AMD is doing the same with Zen.
Windows 7 and 8.1 will still work on newer CPUs. They just won't be able to take advantage of any optimizations introduced by newer CPUs. If software vendors want to support the newer optimizations on older OSes they're free to do so.
The hardware vendors have nothing to do with this. Say AMD adds an optimization to their CPUs for some particular task. It's up to the software vendors to update their software to take advantage of that optimization. The unoptimized code will still be backward compatible on the newer CPUs.
It's like if MS said in 1997 that Windows 95 would not support 3DNow but Windows 98 would.
Windows 95 would run fine on 3DNow CPUs but wouldn't be able to use the 3DNow instructions.
Just keep to older hardware. People are still using C2D-era or even P4-era computers. It's not year 2000 when CPUs grew twice as powerful within a year and (AND that power was actually quickly utilized by software).