[dmix]

Whether it can be used like an more FP-style Python/Ruby is one thing but whether it can replace Rails is a whole other question. This website is dedicated to answering that:

https://www.arewewebyet.org

(although looking at it again most of the content links are a bit old, but the library stuff seems current)

[enz]

I think that a Web framework such as Flask (without the ecosystem of its plugins) or even Falcon can be replaced by a Rust app, as of today. But, I totally agree with the rest of the website. Before replacing a Django or a Rails project, there is some work!