100% on Steam Deck from December 2022

If you want to protect the system from untrusted software with containers be careful. Containers and images are mostly an abstraction tool to run and control the applications. Not saying it’s not possible, it’s just easy to make it insecure.

No. It’s only about the kernel itself, not Linux Systems(aka Distributions).

Earlier the kernel did only consist of C code, but for some time now the option to develop parts of the kernel in Rust is being worked on. In the end it both compiles to native machine code. The running kernel does not require the Rust toolchain to be present.

I sunk a lot of time trying to design a narrow ship that can go really fast through shattered planet. Higher than 270km/s is really tough