EDIT: I don't normally ask why my comments are downvoted but I feel like the two people who did must know more than I do and probably have a good answer to my question. Why did you downvote this?
> To achieve our goal we use standard Linux technologies like containers (LXC) to separate the Android operating system from the host.
I don't know much about what Microsoft is working on, but "running Linux inside of Linux inside of Windows" probably isn't what they really want to do.
That's not quite the reason why it's deprecated. Microsoft can emulate a stable kernel's ABI for a long time before needing to update, so it's not the "fast paced dev" of Linux. The problem that Windows simply can't 100% emulate the behavior of all syscalls with the way NT functions. As a result, WSL1 will always be a subset of the syscalls available on WSL2. It won't matter if they don't keep up with new ones, however it starts to make WSL1 less useful over time.
For a few years it may continue to be useful, however soon enough you won't be able to run a modern distro on WSL1. At this point it would actually be defacto deprecated.
Thus probably nobody, neither MS nor 3rd parties, will base a medium/long term plan on WSL1 now. It's already legacy tech; still maintained for essential things (security, etc.), but already legacy.
Just an observation: snap seems like a strange hill to die on when flat pak exists