• star-tex: a TeX engine written in Go (automatically translated from Knuth's WEB description)
• varda: a WIP photo/video album handler
• odf: an OpenDocument format handler

I guess it's because gorilla/websocket has had a really big mindshare for a very long time. and no project has had time to catch up and/or provide "reliable" hints that they will maintain that new project for a sizeable long time.

"the devil you know" and "the technical debt you know"...