Haxe is amazing, has macros etc. A force multiplier if you are a solo developer for sure. But damn, you feel kinda alone if you are using it. Not everything is an npm install away which negates your velocity gains from using a saner language.
I RARELY/NEVER have to build an app so fast that i just fart out whatever broken code as fast as my fingers can type. IF i get a project like this with a deadline of "yesterday" i politely just refuse. I will be wasting my personal time, and the clients time. And the result will be a broken mess that will eventually take more time to fix, than it would have if i in fact did it "correct" from the get go.
That said Haxe has externs, enabling you to target JS/PHP and use the rich ecosystem both langauges have. The best part of externs is that IF i only use 4 things from given package, i statically KNOW i only use these 4 things, and can refactor more easily, or even build the thing i need myself.
When I'm talking about velocity, I'm not talking about coding fast, but being able to write DRY, flexible yet easily maintainable code that can weather future requirements / refactorings easily. Personally, I'm also talking in the context of my own projects so nobody is breathing down my neck or pressuring me with time. I just want to write good code that is a joy to maintain for years to come.
It is. And only getting better SLOWLY by each iteration. The thing i love about Haxe that once you use it, your installed version is not legacy in a month (unlike npm/typescipt ecosystem). Haxe is fully working, and does not need a lot of "new" features.
More news about Haxe can be found here: https://haxe.io/ (the old blog is not updated AFAIK)