Fyi, at this point the Neko VM has more or less been replaced by its spiritual successor HashLink (used by games such as Northgard and Dead Cells). It achieves better performance by being a strictly typed VM. It also has better tooling (breakpoint debugging in VSCode, profiling).
I don't think ActionScript <> JavaScript is as important here as everything else about Haxe (full / safer static types, speed, multi-backend, pattern matching, etc.) and Typescript (gradual typing to support idiomatic JS code at the cost of being unsound by design).
If you applied Typescript's philosophy and design to AS instead of JS, you'd get something much closer to Typescript than to Haxe, is what I'm saying.
Ecma / JavaScript -> Typescript
Ecma / ActionScript -> Haxe
Haxe is truly fascinating and Neko is a great engine as far as I could test. But the language suffers from global scale adoption, not due for the quality but due to the lack of big names representing, I feel.