I think that one of the really bad problems with gpg and openssl is that for a long time there was effectively only one implementation. So the key thing for ma

I think that one of the really bad problems with gpg and openssl is that for a long time there was effectively only one implementation. So the key thing for matrix is to create a healthy ecosystem that has multiple implementations of the protocol and make sure that the protocol can actually evolve. Note that the 'identity server' is an optional component. As long as you stick to matrix native user IDs, there is no need to use one.