Comment by jvolkman

IntelliJ was unsupported ("community supported") when I joined in the summer of 2015. I built a new protobuf editor plugin during that period as a side project, mostly for myself, which suddenly became used by thousands of Googlers when IntelliJ became the supported IDE again in ~2016?

I eventually handed it over to JetBrains and I think it ships by default with IntelliJ now.