[wahern]

The benefit is that the Haxe compiler can target many more languages than any Typescript compiler. I've never used it, but I've seen some presentations and AFAICT its features and relative maturity (particularly of the overall project and community; i.e. its brain trust) make it a useful piece of technology for some companies making real products. Version compatibility is spotty, but that seems to be because Haxe features and targets are largely demand-driven by whatever product someone is currently trying to design and ship.