> while FOSS influenced by corporate needs is about standardizing around 'blessed' platforms like is happening in Linux distributions with adoption of Rust

Rust's target tier support policies aren't based on "corporate needs". They're based, primarily, on having people willing to do the work to support the target on an ongoing basis, and provide the logistics needed to make sure it works.

The main difference, I would say, is that many projects essentially provide the equivalent of Rust's "tier 3" ("the code is there, it might even work") without documenting it as such.

The issue is that certain specific parts of the industry currently pour in a lot of money into the Rust ecosystem, but selectively only where they need it.

The Rust Community is working on gcc-rs for this very reason.