A language is valued by its programmer bench, tooling, available libraries, as well as the language itself. Honest question - what is better than go right now?
Go has its good sides, but it's just a tool. It's not the best, because tools aren't supposed to be the best. Tools are supposed to be useful for what they're made for.
In comparison I can just start goroutines and Elixir processes for fast and simple I/O parallelism almost without thinking about it.