Linux isn't certified, and none of developers using that seem to mind. If Microsoft got WSL "certified", would any Linux user consider it a better Linux than Linux?
The point is how many people care about running Linux in a VM (which is all WSL2 is) on Windows instead of running a native Unix operating system? Out of those that do care about running Linux, what is the practical difference between running Linux in a VM on Windows and Linux on a VM on Macs?
Part (not all) of the Mac resurgence was that you needed a Mac to develop iPhone apps.
Part (not all) of the new Windows resurgence is that if you even really want to play around with ML or VR dev you need a Windows machine.
I feel like it's about the possibilities - with WSL, Windows Terminal I get what's essentially the mac experience but can suddenly do so much more.
No matter how good WSL is, if you want to develop iOS apps, you still have to buy a Mac.
There are around 200 million consumer PCs sold a year. Do you really think any significant number or sold to develop VR apps - that market is minis use.
https://www.theverge.com/2020/5/1/21244468/steam-mac-support...
Coupled with a history of GPU driver support usually being best on Windows and having good GPU support is usually pretty important for VR, its pretty clear why Windows is probably the best platform for VR development at the moment.
https://www.engadget.com/half-life-alyx-adds-1-million-vr-us...
Do you mean machine learning? If so, then that doesn't match my experience at all.