There are lots of reasons! I'd encourage people to try something new (Go, Rust, Scala, whatever), it's easy to ignore Node's shortcomings sometimes. Community was a big one for me, the "unixy" nature of node+npm is no good when the module quality is pretty poor and the names are completely nonsensical, your app just becomes an abstract blob of code that makes no sense. Go's stdlib is pretty rock solid, nothing in Node comes close IMO.
Having just spent more time at work this week creating PR for bugs in npm modules, instead of doing actual work... I'm starting to agree.
But honestly I think that's just par for the course for any substantially popular language. I don't think Go (or any other language) is inherently immune to this.
