I've only used Scala and TypeScript. TypeScript is crap compared to Go. It's yet another abstraction layer on top of javascript and it's much slower and even more difficult to program with than Go. There's no point in using TS when Go is there.

Scala is yet another language running on a JVM and its syntax is almost as bad and clumsy as Java. Most benchmarks put it on par with Go in terms of performance.

I just don't see a point in using these languages when Go is just as capable, more simple, compiled to binaries (and can even run on bare metal in some cases), runs on more platforms, has much better editor support, and is just more fun to use in general.