Before I became a GopherJS maintainer I had no idea how incredible of an achievement that would be: https://mastodon.social/@andrewrk/109621905821062620
Growing an active contributor community is hard. Even harder when it comes to folks willing to do the unfancy, grindy work such as triaging old issues — very few people consider it an enjoyable leisure activity, or are willing to do it regardless of not being paid. So hats off to the Zig authors for getting there, I'm sure it required a lot of persistence.
As for GopherJS, I am truly delighted that virtually all changes that went into 1.18.0-beta2 release came from contributors outside of the core maintainer group. Many of them are non-trivial too. We are still struggling to find volunteers for recurring tasks such as new Go version support, but hey, hopefully we'll get there.