The newest version is built on top of create-react-app so yes you can eject, I haven't done so though. You can use whatever editor you like, but you won't get t

The newest version is built on top of create-react-app so yes you can eject, I haven't done so though. You can use whatever editor you like, but you won't get the automated features like "Create Component" setting up your js, css, tests, and routes automatically. I expect this will be the biggest stumbling block for most devs. I may be unusual that the transition from sublime to the web based editor was very smooth and didn't slow me down.