Is there a winner in the HTTP Rust library wars yet? The last time I used Rust, Hyper was on top, but I hear it's no longer cool. "reqwest" is being talked up. You can also get several versions of the same library in the same program through dependency problems.[1]
This is a process problem. The development process for Rust does not seem to force convergence.
[1] https://hackernoon.com/programming-in-rust-the-good-the-bad-...