That's not true in any practical sense. Sure you can run the xp calculator app on windows 11, but so what? Most of the programs that people want backwards comp

That's not true in any practical sense. Sure you can run the xp calculator app on windows 11, but so what? Most of the programs that people want backwards compatibility for, enterprise apps, won't run correctly. Yes that's mostly because of how they're coded, but even if the source code still exists, I doubt anyone is putting effort into updating them at this point, and is just running xp or 2000 in a vm.