What makes Rails (and similar frameworks in other languages) great is the large number of companies using it in production and having many people contribute to

What makes Rails (and similar frameworks in other languages) great is the large number of companies using it in production and having many people contribute to it. It therefore is very feature complete and works for a lot of use cases and edge cases. For everything that Rails does not do out of the box, there is a great ecosystem of libraries. Rust has no such framework. There is often just one person pulling the whole project and the number of active contributors is very small. This carries some risks and might mean that you end up having to do a lot of plumbing yourself.