Would love more specifics because I think this is an area where C# shines especially with hot reload. Even better if you wire it with CSharpRepl (no rebuild at all).
Serialisation with serde is top-notch imo. Equivalent approaches in C# or Java are strictly worse.
Axum's approach to dependency injection is clear, obvious, and mostly free of footguns.
Yes you end up gluing multiple libraries together instead of ".net" but I also prefer that.
I really like C# the language but .net is too full of crud, over-reliance on OOP, and the culture is not there imo.
Somehow Rust makes building web services really great for my set of values.