FWIW, Cap'n Proto (https://capnproto.org https://capnproto.org) is a cross-language network protocol based on E's design (with direct help from E's creator, Mar

FWIW, Cap'n Proto (https://capnproto.org https://capnproto.org) is a cross-language network protocol based on E's design (with direct help from E's creator, Mark Miller). So if you're interested in E-style capability-based security but want to use a more mainstream language, consider taking a look at Cap'n Proto. (Also Sandstorm (https://sandstorm.io https://sandstorm.io) is a server platform implementing this model. Disclosure: I am the lead developer of both of these projects.)