This sounds believable to me. But I'll put my tinfoil hat on just for fun and pretend it was an intentional move. Could this make sense as a new twist on the old strategy, making it "Embrace, Extinguish, Extend"? With the WSL, they made it theoretically possible to run Linux software on Windows. With that in place, locking existing users out of Linux might cause a lot less negative backlash as the users can still continue to use their old programs - except under the supervision of Windows. If this catches on, it could actually allow Microsoft to grab some if the more consumer-oriented parts of the Linux ecosystem.