I think a lot of people forget how long ago Electron/Atom were released, and the subsequent Cambrian explosion of Electron based apps and editors like VSCode. There's probably a huge amount of developers that haven't used anything else.
Zed feels significantly faster than VS Code, but it also doesn't feel as polished and "complete" as an IDE, so I'm going to stick to VS Code for now for the same reason I stuck to JetBrains IDEs for so long.