- Creating a language (typescript) that took the front-end web community by storm.
- Becoming one of the real adopters of "progressive web apps". Apple is actively hostile to them, because they would eat into the 30% cut they are making from the apps distributed via the app store; Google, once a champion, has grown kinda tepid, because it also gets a cut from apps distributed via Google Play; but Microsoft now behave as if they are a believer.
- Shipping a tremendously popular text editor, Visual Studio Code.