Personally, I wouldn't actually care if Visual Studio Code was completely proprietary with zero open source element. I think the imagined consequences tend to mostly be not that significant for the vast majority of people, at most it would be a blip in the timeline as people switch to something else. The actual consequence (as implied by this article) seems to be people who build their business around these tools, th…
But there aren't really even consequences for those. The core editor really is free to use however you want; you can use the auxiliary bits which are proprietary, or you can not use them and fill the gaps yourself. That's up to you.