"look its really easy to develop for windows now you have done that, well now we have dropped that so guess your going to have to only develop for windows now"
WSL uses the "real" userland of the distro of your choice. If you are running Ubuntu on it, you are using the same .debs and ELF binaries inside those .debs that "real" Ubuntu is using. If for whatever reason the Windows team decided to "cut bait" and kill WSL, you can quickly spin up an Ubuntu VM or reimage to Ubuntu and continue to be productive.
If there is an opportunity for a Trojan horse here, it's for Linux developers to encourage young geeks to install Ubuntu from the Windows Store and start learning Linux commands in WSL and maybe from there eventually baby step to running Linux full time. (That said, it's not like having BSD terminals available in macOS has encouraged a lot of people to move out of macOS and directly to Linux. Still seems to trend the opposite direction, if the laptops at developer conferences are any indication.)
(a better explination of WISE than I could ever come up with https://news.ycombinator.com/item?id=11072143)
it sounds like microsoft up to its old tricks,
"look its really easy to develop for windows now you have done that, well now we have dropped that so guess your going to have to only develop for windows now"