Earlier quoted context omitted.
What changed I guess is that they switched to embrace Linux full on. And now extending it as well. I trust that Linux is safe from extinguishing though - too much of the world runs on it, and free servers are just too compelling.
What changed is Azure and you can be sure they will do what they can to keep you locked into that ecosystem.
I don't play too much in the MS ecosystem but from what I read they seem to have moved away from the embrace, extend, extinguish methodology. Which is a good thing.