Genuine question, not being sarcastic: why would someone want/need these downloads?
Historical preservation, retro computing, period-correct hardware setups.
There's a tool for blocking selected driver updates that still works on Windows 11. Very handy.
I have a legitimate need to replicate systems that are sometimes very legacy for security research (apps that sit on top, rather than the os itself). Building stuff like a base Windows XP image is easy enough, but sometimes system updates are required - even stuff like iirc tls1.2 isn’t supported in IE6
Installing Acid Pro 6 requires Visual Studio Redistributable packages the Microsoft no longer has available.
At least, last I checked.