GnuPG has by default started emitting keypairs with a preference for the LibrePGP version of the OCB block cipher mode. That mode is not compatible with what the other faction is doing and is not generally supported in any case. Arch[1] and other distributions have apparently patched this default out.

Is Rpgp emitting any new block cipher modes or generating keys that might cause such emission in the future? The risk here is a sort of incompatibility nightmare where decryption becomes a crap shoot.

My article on this mess:

https://articles.59.ca/doku.php?id=pgpfan:schism

[1] https://wiki.archlinux.org/title/GnuPG#Disable_unsupported_A...