Honestly these seem like pretty minor issues compared to the task of properly managing a GPG install.
How do you manage the keys? If you've shared them with a team, how do you ensure someone hasn't taken a copy? What if the key is lost? What if someone ends up replying to the thread without doing the encryption song and dance? It's just such a pain. I'd rather copy and paste something out of Signal and into my bug tracker a thousand times than have to deal with all the footguns of email encrypted with GPG.
How do you manage the keys? If you've shared them with a team, how do you ensure someone hasn't taken a copy? What if the key is lost? What if someone ends up replying to the thread without doing the encryption song and dance? It's just such a pain. I'd rather copy and paste something out of Signal and into my bug tracker a thousand times than have to deal with all the footguns of email encrypted with GPG.