The early adopters are usually transpilers (or code generators) which can quickly take advantage of new features without the effort of rewriting an entire codeb

The early adopters are usually transpilers (or code generators) which can quickly take advantage of new features without the effort of rewriting an entire codebase. In the same way that Rust used underlying `const` attributes in LLVM (and found all the weird edge cases), and Nim used C as an intermediate as have many other lisp or object-ish languages.