The new Microsoft has made it clear that they want to support as many areas as they can. Azure does not have any lock-in of a specific platform (other than Azure itself in some ways) and Microsoft is constantly trying to get their tools to work in Linux and Mac. While they obviously would prefer you to be on .Net, they realize that lock-in ultimately hurts them.

Just give it a little more time. They are turning around years of company culture and they're doing a great job at it. If VS Code is a sign of future products, I'm excited to see what they come out with down the road.