The new new Microsoft is the old Microsoft. They're already attempting to extinguish open source VSCode (much more "open core" nowadays). However most of the cool projects based on "VScode"are actually based on its open core which Microsoft won't be able to take it away.

Originally there wasn't even source code to look into at all, VSCode started as an Web IDE for Azure.

I thought VSCode was a fork of Atom. Did I just make that up?

Yes, it used to be called Monaco initially.

https://microsoft.github.io/monaco-editor/

Also Erich Gamma from Eclipse fame, and GOF book, is the main architect.

"VS Code an Overnight Success… 10 years in the making"

https://www.youtube.com/watch?v=hilznKQij7A

VSCode remote editing on Github is it returning back to its roots.

You did ;) Its design was clearly inspired by Atom, but it was written from the ground up

what was that thing where they invited open source dotnet projects to join a curation club on github, and proceeded to take over those projects?