Easy to learn: you can be productive in go in a day or two.
Strong standard library.
Complies to binary. (you dont need to drag a run time around) And this is fast!
Easy dependency management.
Linting is built in. (No arguing over tabs vs spaces)
First class testing. (and its fast)
"good enough" coding is very fast. You can mostly ignore performance and pick it up when and where you need it.
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Go users tend to say "Idiomatic" a lot. Your not getting rails, there is no java like framework, and you really should NOT do the node js thing and stack tools to the sky. Minimalism, brutalism.
As an example: Most languages have tooling for dependency injection. Most go projects have dependency injection but dont use a library or framework or tooling to do it. Its just a bit of code (100 ish lines) that you end up writing as part of your bootstrapping, config or testing (depending on the project)....