TypeScript is looked upon very highly by everyone at MS and I haven&#x27;t seen any new projects started with vanilla JS in the last few years.  No one needs to encourage anyone to use it.  It&#x27;s just the obvious choice for large projects (and every project at MS is large).<p>Some other products using it off the top of my head: Azure Machine Learning, Xbox Music, Visual Studio Team Services.  EVERYTHING new.