I can understand wanting to move from TypeScript to a non-JS language (is that a thing yet? with WebASM?), but it looks like they were moving back to plain Java

I can understand wanting to move from TypeScript to a non-JS language (is that a thing yet? with WebASM?), but it looks like they were moving back to plain JavaScript. Surely the cost of slightly longer build times are worth paying for the benefit of having a type system (and as I understand other benefits such as OOP lang features like classes and interfaces, in favor of Javascript's prototyping weirdness)? I will never understand web developers.