Curl will be dropping Hyper due to lack of maintenance (github.com)

Darn

Btw that's not exactly what it says. It says that the integration of hyper into curl is not being maintained, not that hyper itself is not maintained

> It is undoubtedly hard work to fix these remaining problems, as they typically require both rust and C knowledge in addition to deep HTTP familiarity. There does not seem to be that many persons interested or available for this challenge. Meanwhile, there is little if any demand for hyper from existing (lib)curl users.

You might as well replace HTTP with OS, hyper with rust and curl with linux, and you get the current situation with Rust adoption on Linux.