[zinekeller]

For something like curl (which is also used in embedded systems: a legally-verified (compliant with ISO and other standards, for better or worse) Rust compiler that targets common microarchitectures is a definite first step. Fortunately, the first half of it exists (Ferrocene, https://ferrous-systems.com/ferrocene/). The second one is harder: there are architectures even GCC does not target (these architectures rely on other compilers like the Small Device C Compiler (or a verified variant) or even a proprietary compiler), and LLVM only compiles to a subset of GCC. Even if there's a GCC Rust (currently being developed fortunately), you are still leaving a lot of architectures.

[jrpelkonen]

This is a good point: there are many niche architectures where Rust is not a viable option. But in this specific case, I don’t see these system benefiting from h3/Quic. HOL blocking etc. will rarely, if ever, be a limiting factor for the use cases involved.