If you come from a Python/Ruby/JavaScript background (which is a lot of people), Go is a language that is not much more complex but will run faster and be easier to distribute. I can see that being a big appeal, especially compared to something like Rust or C++ which is going to require a lot more learning to become productive.
I started with Go out of shear curiosity a few years ago. Built a few web backends with it, and a number of simple utility tools with it. I know this is a bit of a broken record line, but it's standard library and simplicity have made it something I naturally gravitate towards. Especially when I need to do something quick.
Who wants to learn Go apart from the people posting in Go threads here on HN? I have yet to meet anyone who is not in this micro-cosmos who's even heard of it.