Note that unsafe blocks don't have limited blast radius. Blast that can be caused by a single incorrect unsafe block is unlimited, at least in theory. (In practice there could be correlation of amount of incorrectness to effect, but same also could be said about C undefined behavior.)
Unsafe blocks limit amount you need to get correct, but you need to get all of them correct. It is not a blast limiter.
Unsafe blocks limit amount you need to get correct, but you need to get all of them correct. It is not a blast limiter.