> It's not clear why.

The situation is farcical, and stems from the double bind that PGP has been in for at least 20 years: the standards are bad and need modernization, but it’s impossible to modernize them because the single thing that retains “serious” users of PGP is backwards compatibility.

The end result of this is a version of Weekend at Bernie’s where both GPG and OpenPGP are fighting over how to dress up the corpse, while the rest of the world has moved on.