You can undo the "eject" operation of a Create React App app by adding the react-scripts package back and changing a couple of lines on the package.json file to their defaults. You can lose those /config and /scripts directories too. The only really ugly thing I found on my test (admittedly on a very simple app which is probably not at all representative of the real world) is that a number of packages were added without an easy way to get rid of. But hey, doesn't that sound like good old npm anyway?