A counter-example I've seen is Bazel; the Bazel core team seems very receptive to outside contributions and feedback from my experience (I've contributed PRs to Bazel).
(I don't use Go, so I don't have much insight into the overarching discussion. Just wanted to add my 2c).
(I don't use Go, so I don't have much insight into the overarching discussion. Just wanted to add my 2c).