@thunderbird should at least open a path to allow us to replace their OpenPGP implementation, RNP, with other implementations, like @sequoiapgp's Octopus.

Integrating #Enigmail was not seamless. Functionality was lost, including #GnuPG's keyring and trust model. (e.g.: bugzilla.mozilla.org/show_bug.…)

They may have their rationale on which they made these decisions, but the negative effect on the usability of Thunderbird+PGP for those who have them for many years is real.