The point is, considering we are both using x11, why should a new person from Windows need it now?

Depends on their hardware. I use 4 monitors at:

• 1440p 165hz (FreeSync)
• 1440p 75hz
• 1440p 75hz
• 4k 60hz

It works better on Wayland. Other users could be in a similar situation.

iirc, you can’t use FreeSync with multi monitors on Xorg as well