[hazz99]

They’re not doing anything wrong, but working with generics, traits and async code is very much against the grain of the 2018/2021 editions of Rust.

The async story hasn’t finished, and is definitely the area that needs most improvement in terms of developer experience. There are a number of gated features and RFCs that propose solutions to these problems (e.g. GATs), but they haven’t been moved into the core language yet.

That doesn’t mean Rust is inherently bad or difficult, only that we’re working with an early version. Rust is young! We didn’t have futures until 2019, iirc.

Lots of core Rust concepts (lifetimes, ownership, references) need to be rethought for how they fit into asynchronous programming, and how to make everything compose well together.