Transpiling to Rust gains you nothing. All the benefit comes from further rewriting after that, so the limiting factor will be how fast you can understand a com

Transpiling to Rust gains you nothing. All the benefit comes from further rewriting after that, so the limiting factor will be how fast you can understand a complex program written in a language you're unfamiliar with, which is written in an unidiomatic style (because it's been transpiled to that language rather than written in that language).