It's worth pointing out, in terms of LE being "wildly more successful", that this represents a single organisation, with a security critical role on the web, ap

It's worth pointing out, in terms of LE being "wildly more successful", that this represents a single organisation, with a security critical role on the web, approaching a monopoly. That's actually a worse situation than if 100% of hosts on the internet supported (different but compatible implementations of) IPv6. Here is a chart showing the trend for LE marketshare (under the IdenTrust root): https://w3techs.com/technologies/history_overview/ssl_certificate https://w3techs.com/technologies/history_overview/ssl_certif... I really support LE's mission, and celebrate their success, but would feel more comfortable if a separate organisation tried replicating what they had done, running the same service but with distinct personnel and assets. For reference, here is another chart showing the run down of the remaining IPv4 supply: http://www.potaroo.net/tools/ipv4/plotend.png http://www.potaroo.net/tools/ipv4/plotend.png