I do think that's a real concern...however in some ways this is an admission of failure - users like what's in the WSL enough that they want more linux, versus just some subsystem which is consumed by other apps.

Also, I think linux users (desktop/servers) who actually write code and provide updates for programs, aren't likely to pause the world for WSL. Its not exactly 'linux' nor the destination for their code, WSL stands a risk of becoming obsolete, if not properly maintained etc.

Its also good in some sense, it exposes users to linux capabilities and the like, who might not have had the guts to run a live cd or deal with modern hardware foibles.