@bf55f1f1 So I guess that only people would use it who are already familiar with Rust and convinced by it and they want to build a backend. But then, if they are already sold on Rust, wouldn't they just learn async?
The route for newcomers before they can work with Axum and SQLx is longer than other routes which don't include async. But for people who are familiar with Rust, it is just one step: Learning async. And I think that we currently have a problem of documentation here as you mentioned. 

 @bf55f1f1 My conclusion would be:
- Improve the documentation of async
- Make this difficulty levels clear to newcomers to climb up step by step: sync single threaded < sync multithreaded < async single threaded < async multithreaded
- Stabalize missing async features like async traits (work in progress)
- Try to reach having libraries agnostic regarding the async runtime (lowest priority for me personally since we have Tokio)