Modern Windows already offers exactly this, including defaulting to evergreen but having the option to bundle, in WebView2 https://developer.microsoft.com/en-us/microsoft-edge/webview...

But they dropped plans to support it on macOS and Linux so it's a bit useless as an Electron replacement. Not that it was exactly a drop in for Electron - it's web based but with a different set of extra APIs. I don't think things will move as fast to something else now that apps are already built on Electron and the savings is for the user rather than the developer. It really needs to be 100% Electron compatible, just with the difference in launch behavior.