You can install it upon Arch from AUR.

Putting that aside:

Windows users always find a reason not to switch to Linux because some missing feature. In two years? There will be another new feature or game on Windows. I remember people insisting on using Windows because it support their „3D-Shutter glasses“ or their card from Nvidia. Either you want use Linux or not :)

Why are many features initially only available on Windows?

First. That is wrong. Important features like cgroups, namespace and containers/Flatpak where novelly developed upon Linux.

Second? MBAs only look at past numbers. So Windows often get traditional Windows stuff first. You make guess it, innovative companies care about what will be possible in future. Valve for example.

The MBA style thinking is also in many consumers. Still buying Nvidia? Because they were faster in the paper sheet? I prefer the cards which works well with Linux, so AMD or Intel. Frames actually generated are more worth than problems with proprietary drivers.

PS: Linux has maybe won the war against drives. Seems like Nvidia open most stuff slowly and feature land in the nouveau-module or mesa. A decade to late. I’m already in Team AMD ;)