@filippo Sounds like an excellent way actively ignore anyone who is not already in the inside circle, and who had yet had a need to interact with Go, outside of using a fairly great language that otherwise "just worked" for them. I would be one of those. Also, no, I did not read the full proposal. Once I realized it's opt-out I could not care less of what you collect, opt-out is a hard no. If/when that change I may bother looking at it.
On the upside for me personally, I finally got around to check out OpenSnitch now, having been a LitteSnitch user previously.