We're at the embrace stage right now, that's why you see it getting integrated.
And if you run WSL, you usually end up with a special kernel, it's not just the upstream one without changes.
Both my Arch and Ubuntu WSL is on kernel `Linux desktop 5.15.90.1-microsoft-standard-WSL2` rather the ones the distributions ship with by default if installed normally. This is the one they ship via Windows Update which you end up using on WSL: https://github.com/microsoft/WSL2-Linux-Kernel
Watch them slowly make it different than the upstream one, without contributing patches upstream.
And if you run WSL, you usually end up with a special kernel, it's not just the upstream one without changes.
Both my Arch and Ubuntu WSL is on kernel `Linux desktop 5.15.90.1-microsoft-standard-WSL2` rather the ones the distributions ship with by default if installed normally. This is the one they ship via Windows Update which you end up using on WSL: https://github.com/microsoft/WSL2-Linux-Kernel
Watch them slowly make it different than the upstream one, without contributing patches upstream.