Ask HN: Why is there not a Go specific IDE?

I'm new to Go, and have very much enjoyed learning it, but coming from Python, I'm used to available full featured IDEs. I realize there are lots of plugins for popular editors (and even some IDEs), and I've been using the go-vim plugin.

This is not at all meant as a criticism, it just surprises me that with all the features like tests, benchmarks, coverage, documentation, etc that there is not a IDE specific to Go.