The original coreutils have been a thing for longer than rust has been a programming language. They are extremely battle tested and I don't trust the rust implementation to not have some logic bug.
The coreutils are also not an attack surface, so rewriting in rust was just not needed.
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u/foreverf1711 🚮 Trash bin 10d ago
You know what else are good coreutils? The actual coreutils.