I agree this particular C# being >160x slower may not matter much for one-off commands keyed-in by and watched by humans, but that may not be all that matters. E.g., some people might `find . -print | xargs -n1 cmd`.

EDIT: Also, it's misleading to bundle Nim with C and its many & storied footguns. While "low-level" is somewhat subjective and you can opt-in to go as low as C (if you so desire), most Nim code is as high-level as Python or C#, and the language has very high-level capabilities. E.g., Nim has user-defined operators like Julia. Want to add `=~` or `~` for regex pattern matching? No problemo. In that aspect, Nim is arguably higher-level than C#.