FWIW thank you for that, even without PFS and no adoption it's at least interesting to see a more recent effort to work within the flawed existing email system but do a bit better then PGP. Like OpenPGP or S/MIME themselves I guess, simply made with something beyond 90s era crypto experience. Although even for something at that stage I'm surprised they don't have anything I can see about what the identities they use are like in the FAQ at least. That's a significant practical difference in PGP and S/MIME for example.

Now that I think about it there is also a modest effort to simply enhance the UI of the whole deal through transparent embedding vs as an attachment. I think modest efforts of that nature that are evolutionary vs revolutionary around existing installed base will like it or not continue to serve an important practical role.