Comment by ykonstant

At million user scale, feature parity and compatibility is truly paramount and, `rg` aside, Rust utils don't have a great story to tell there. Such software has evolved in the course of decades and its (usually despair-inducing) code is tailored for dealing with a tremendous number of edge cases, platforms and architectures. Rewrites in Rust tend to write "the cool parts" and indeed write them better and faster, but that is just not good enough for replacing the standard tools.