> I conjecture that shells run all sorts of systems that Rust programs have never run on. Rust now runs on all kinds of embedded systems, including MSP, most c

> I conjecture that shells run all sorts of systems that Rust programs have never run on. Rust now runs on all kinds of embedded systems, including MSP, most current ARM architectures, MIPS, PowerPC, and even (via forked version of Rust soon to be merged) AVR. So it can run on most, if not all, major architectures that shells run on.