&quot;Before it was bootstrapping, it was written in OCaml.&quot;<p>That&#x27;s been my exact recommendation for getting compilers started in robust way. You people keep surprising me in pleasant ways. :)<p>Curious, did Ocaml&#x27;s clean syntax and ease of decomposing functions make the transition to Rust easier vs a language like C++ or Java? I predicted ML languages should have that benefit but I couldn&#x27;t test it on small projects.