Isn't that what made Windows great that your programs worked from generation to generation? You don't have to run something on Windows XP to have it work in Windows 10.

Also you can separate those features, as a programmer. There is no reason to not have that run separately.

I can see "Oh this new CPU has new hardware that allows for faster whatever.". But that is simple, just have allllllll that legacy stuff in a separate location and only call it when you need it.

It will be legacy support from 2025 in windows 10. You still have all that code. It isn't like Windows 11 has some special thing. I have seen i3, 4GB of RAM, and 64 bit CPU. But if 64 bit CPU's couldn't work then we wouldn't have 64 bit Windows 10. And Old 32 bit programs wouldn't work on Windows 10.