Why matters that is written in Rust? Because there are already a few JS tools written in Rust, so you can now use the crates from projects like Deno[0], OXC[1], BiomeJS[2], etc to write your own tool with minimal effort.
Also note that the Vite team is writing Rolldown[3], and guest what? They are writing it in Rust.
[0] https://crates.io/search?q=deno [1] https://crates.io/search?q=oxc [2] https://crates.io/search?q=biome [3] https://rolldown.rs