Comment by excepttheweasel

The main downside to using Rust for web apps - at least in my opinion: is having to learn and use a type system which includes affine types: lifetimes, borrowing etc. But if you've already put in the effort to get to grips with this part of the language, that's not as big a drawback. Then you get all the other positives of the language, like its strong type system, fast speed, sensible package manager, lack of GC pauses etc.