One option: To have full control of the user experience when people are working with Microsoft tools and technologies. And maybe to push the whole editor marke

One option: To have full control of the user experience when people are working with Microsoft tools and technologies. And maybe to push the whole editor market to a direction they like. A bit like what Google did with Chrome. Think about for example Typescript language service. Now they have been able to push the idea and demonstrate how useful it is. Probably this generates demand from users for other editors to add same feature.