The whole recent crop of extendable editors (atom, vscode, zed, etc.) seem to have been created by a younger generation that never used emacs (and are perhaps scared of it because they find Lisp weird) and so are reinventing the wheel.
I’ve never used Emacs, but heavily used Vim/NeoVim for many years.
I recently switched to Zed because I was tired of shitty terminal emulators on Mac, and wanted something designed from the ground up with speed and GPU acceleration in mind. All my screens are 120hz and I needed something capable of keeping up with that.
I think new editors are created because of an underserved aspect of the classics (Emacs/Vim)—in Zed’s case it's addressing the poor GUI experience—and then have to recreate tools in their new frameworks. It’s a good thing. Monopolies are bad, and rethinking how we do things is good.
