As for the other platforms, and what Google is paying for, lets see where the bribe drives people into, after all from your point of view Google should rewrite gVisor and everything k8s as well.
Yes it definitely will, but not only, specially among groups where not using a GC is more of a religious issue than an actual technical impediment.
Windows is a good example of this politics game actually.
Joe Duffy mentioned on his Rustconf keynote that even with the system running in production, the Windows team couldn't be argued against.
A system that even powered parts of Asian Bing infrastructure.
Likewise they clearly sabotaged the Longhorn efforts, to replace them with COM, and yet UWP, mostly written in C++, happens to usually run slower than traditional .NET applications on Win32, or any other compiled GC'd language on Windows for that matter.
That sounds snarky, I know. I promise, I'm not being snarky, and, again: it ain't my first choice (it'll be fine though).