More stable than python that's for sure. You could just go with react or node (depending on your use case) , pick a build tool, and be set for half a decade. That's absolutely not the case with Python, and I'm not just talking about the breaking changes that happen in some releases. You also don't get a mess of venv, conda environments, incompatible packages, having to use docker to deploy your app, etc. I use Python a lot, and I like it, but Javascript is much more stable as a platform for quite a lot of what python is generally used for.