[nickpsecurity]

"Signal does a better job of practically everything PGP does with regards to message encryption."

Except for endpoint security. The ultra-portable, self-contained implementations of PGP can run on countless configurations of desktop or embedded system. Transport methods also vary if they're funning messages or files through other apps. All sorts of hardening or isolation techniques can be applied. Remote attackers have a lot to look at trying to break or bypass GPG for an arbitrary user. Whereas, vast majority of Signal use relies on one app with two OS's.

The extra security tech and obfuscation you can layer on PGP/GPG is still an advantage in its favor until competition gets that.