I've always found it relatively strange that in the JS world, where the frontend is moving really really fast, Express has always been the main choice for backends with no real challengers through the years. Is this due to a difference of culture between the frontend and the backend? Or maybe the lack of backing by a big company? Angular was backed by Google and was replaced by React backed by Facebook, since then Vue and Svelte became popular but not at the level of React. On the other hand, Go (backed by Google) became really popular on the backend.