And from Internals discussion (https://internals.rust-lang.org/t/add-some-form-of-precompil...) it seems this causes more problems than it solves.
It requires huge storage, for each combination of targets, and even if it is was solved some members of Rust community would see it as a step back.
Me included. They are hard to audit and are step back to OSS nature of Rust.
A systems programming language is supposed to support all deployment scenarios, not to be religious.
I thought the whole UNIX mentality was worse is better.
No build tool is without issues, my pain points with cargo, are always compiling from source, build caching requires additional work to setup, as soon as it is more than pure Rust, we get a build.rs file that can get quite creative.