In its current state, Static TypeScript is a toy compared to AssemblyScript. It doesn’t support much of the original TypeScript features, while AssemblyScript

In its current state, Static TypeScript is a toy compared to AssemblyScript. It doesn’t support much of the original TypeScript features, while AssemblyScript is getting pretty close to the original TypeScript. AssemblyScript was also specifically designed to target WebAssembly. For example, it supports 64 bit types and has builtins that directly map to WebAssembly opcodes. Static TypeScript would have to be repurposed as explicitly targeting WebAssembly in order to become a viable alternative. And Static TypeScript is part of a set of projects with very different goals. That being said, it could indeed be turned into something targeting WebAssembly. And unless Microsoft goes that route, it may happen as a fork. Still, I’m not sure of the benefits compared to AssemblyScript. I’d rather see Microsoft contribute to AssemblyScript.