Python cryptography, Rust, and Gentoo

> brcm still ships gcc4 as the primary toolchain, as an example

Which means that the same complaints would arise for using any C features that GCC 4 doesn't support, such as most C11 features.

I remember seeing complaints when projects dropped support for pre-C89 compilers. Those complaints don't make it reasonable to keep K&R C support forever.

> Requiring software that never existed to build software for real systems (like s390x)

Rust supports s390x. It sounds like Gentoo didn't ship Rust for that platform.