I can confirm this behaviour. I once made a video about the downside of Rust[1] where I also talk about the problems you encounter when using `async`. Even though it's clear that there are fundamental problems (e.g. missing support for async traits), people usually comment that I "should've used a higher-level library" to overcome this problem.

[1]: https://www.youtube.com/watch?v=pmt0aaquh4o