This is true, especially for games. But for some reason, even though some compatibility features have been removed from windows, others still remain. Hell, if you look into System32, you can still find the dialer app from windows 95 (still with its original icon, btw!), or Windows Vista’s “bubbles” screensaver, and they still run.
Edit: this is not a windows praise, it’s a critique. Those parts are dead weight, and windows isn’t even that good at offering compatibility for old software
I’ve always heard this claim, but in reality I’ve had more luck running old software on linux with wine than on windows.
Windows has a lot of old bloat still around (even some win3.11 apps remain on win11), but that doesn’t mean it’s that good at backwards compatibility. Backwards compatibility also requires an effort, which Microsoft doesn’t want to make.