As someone who has written more C# and Java than Go... I can read Go much easier than most other languages. I can step into a huge codebase and usually quickly reason what/where I need to make my changes without too much effort. This can be the case with C# and Java, but it seems to almost always be the case with Go.
This means there's no payoff for specializing because the project has no domain-specific idioms that help at all with clarity and concision—no matter what you learn and how fluent you get, all code will look like the bulky mediocre stuff a novice would have written.
