After looking at both, I chose Atom. The VS Code developers observed that things can pretty tangled with open-ended plugins and HTML rendering, so they cordon

After looking at both, I chose Atom. The VS Code developers observed that things can pretty tangled with open-ended plugins and HTML rendering, so they cordon off plugins to separate processes, and only offer limited UI control to plugins. This helps keep things stable and fast, but I think the ability to have plugins easily create new UI in an open-ended way is the coolest feature that Electron enables in an editor. Atom offers a lot more UI control to plugins, and in my experience, is still acceptably fast and stable.