> will not be available for other editors
they can only extinguish by forcefully bankrupting alternatives. Unfortunately for microsoft, there's no such thing as bankrupting an opensource project.
If neovim's feature set can't keep up with the might of microsoft's development budget for vscode, and many users switch over, then it's a net-win for those users. If microsoft then removes the C# LSP afterwards (or charges money for it), neovim is still around. Those users who don't want to pay can move back to neovim (and may be someone would then start contributing to it again, and over time, the features of neovim will improve again).
Microsoft killed netscape by depriving it of a business model. But you cannot deprive opensource of a business model, because that model is not profit oriented.
Unless microsoft patents the LSP protocols and stops other people from using it (and even then, other editors do not die, unlike netscape), there's no real way for microsoft to EEE.
Google can deprive firefox of a business model (directly by stopping their payment to mozilla, and indirectly, by making the web protocols so restrictive that firefox cannot implement them properly, such as DRM). Therefore, google is in a position to EEE other browsers.