When Rust's Exhaustive Match Helps (And When It Doesn't): Notes from a Bare-Metal Hypervisor

Disclaimer: This is about an experimental hypervisor project that only runs on QEMU virt — no real-hardware validation yet. The lessons apply to "Rust's tooling edges in systems programming," not production guidance. 10 weeks into writing an ARM64 bare-metal hypervisor, I assumed Rust's exhaustive m