None of whom are producing well-supported public code / documentation / conference talks.

Edit: And to clarify. I think part of this is because there's a serious case of imposter syndrome among Scala developers. I feel like much Scala code I've written would make legitimately useful open source projects, but I'm not really happy with the interface, and I feel the innards could be a bit cleaner, so I don't release it, because it feels just hackish enough that I trust it myself, but don't want the outside world depending on it. I'm probably not the only one here.