@richardstephens Yeah – I left them out because they're not quite hypergrowth registries; but they do serve as a clearing house for different registry protocols. (They might acquire a startup supporting a popular-enough registry, but it wouldn't be the exit investors are looking for)
I'm interested in your stance on artifact registries, also: it's hard to wage a war on Big Cached Data! Are you picturing a future where artifacts are built on-site+on-demand, or where artifacts are easily audited?