Yes because there's no reason for a visual studio code extension like this to be closed source.

It's worrying because it feels like MS will add more and more closed source "features" to VSCode and undermine its open source-ness.

It also prevent other editors' users from building Copilot plugins. For example, there won't be a Copilot plugin for Emacs that can be accepted by Emacs's official repostiory.

> Visual Studio being closed source

If VScode isn't the de facto universal editor accepted by every programming language's community (notice that even this particular thread is about a VSCode plugin!), I won't be so worried.