It means that there's a complex tradeoff between making sound guarantees and providing correctness in other ways, a tradeoff that all languages make anyway, eac

It means that there's a complex tradeoff between making sound guarantees and providing correctness in other ways, a tradeoff that all languages make anyway, each finding its own preferred sweet spot, and that we don't know if, say, Rust's sweet spot yields better correctness than Zig's.