WSL2 contains Linux and other stuff. I would not say "WSL2 is Linux" because that kind of imply a bijection which does not exist, and MS is starting to play on

WSL2 contains Linux and other stuff. I would not say "WSL2 is Linux" because that kind of imply a bijection which does not exist, and MS is starting to play on that while extending WSL2 with e.g. D3D12 access to the host and talking about that with titles like: "DirectX loves Linux". That's not even strictly similar to the more traditional "integration tools" of VMs, given the user experience integration they provide which is at the core of WSL (in their case the VM aspect is more of an implementation detail, see the network, stdin/out, and maybe tomorrow GUI integration -- and of course see historically the architecture of WSL1 which provided a subset of the same services without a VM and without Linux), and also given they never talk about opening that kind integration to other VMs, even less third party ones. Maybe they will (I would not count on it) in which case it is slightly more ok, maybe they won't, in which case this is border line an hostile attempt to fork the ecosystem and redefine "Linux" (in the sense of traditional GNU/Linux desktop distros) as Linux running under Windows with WSL.