I'm not sure what you're confused about, maybe you missed the point of this being shared on ycombinator news? Just being written in Rust versus C is part of an open source movement to modernize these old tools and the significance of using a modern language versus an ancient one is better support and features going forward. The reason this tool is currently top voted on ycombinator news is purely because it's written in Rust and of interest to programmers who care about their open source tooling.
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