The question is, did they approach the VS code team and ask them if they where opposed to this feature. Assuming it does not break anything I cannot see why they would be. I get it, it's open source they can do as they please it just seems to me like the logical first step would be to say hey can we combine efforts. Maybe they did, I don't know, that is the approach I personally would take, improve an already awesome open source offering with my efforts as opposed to creating a one off. I would prefer to feed a larger ecosystem and make the pie bigger.