Hyrum's law doesn't apply here. Tons of software is liable to be broken by this and at least three big projects have been broken by it. Furthermore, Apple isn't

Hyrum's law doesn't apply here. Tons of software is liable to be broken by this and at least three big projects have been broken by it. Furthermore, Apple isn't even obeying POSIX since it is ignoring SA_RESTART. It's a breaking change.