People keep mistaking languages with implementations.

OCaml and Haskell don't suffer from similar pain points, because interpreters, and JIT like tooling is also available.

One can happily develop with one toolchain, and press the red button for an optimised compiled build, when it actually matters.

Also both Swift and Rust have made the mistake to make used of the compiler backend that everyone avoids when they care about build performance, LLVM.