In this case this is a library and the information that it is written in Go is indeed useful: you can easily use it from Go code, not so much from other langauges.

Novelty and notoriety. I’ll throw in kindred spirits too. Go is still trying to get traction. It’s not Java, nor C#, not PHP. It’s still trying to prove itself outside of well know, but niche projects like Docker.

/shrug, language matters to me. I like knowing what code i can interface with. Generally speaking, written in Go is a boon to me (as a Go dev obv), written in Python/Node/Ruby is a negative with runtime requirements for me.