I don’t think I understand what you’re implying. Are you arguing that PGP implements less secure operations because it doesn’t have perfect forward secrecy? As far as I know there’s not much out there in terms of encryption schemes for data at rest which includes PFS. Even AGE didn’t have it last time I checked. If you know about something that does provide PFS for data at rest, let me know
https://en.m.wikipedia.org/wiki/Signal_Protocol
https://en.m.wikipedia.org/wiki/Double_Ratchet_Algorithm
https://en.m.wikipedia.org/wiki/Elliptic-curve_Diffie–Hellman
The signal protocol works on double ratchet that works on Diffie Hellman
This is a good read. I think it’s a good solution if it can be implemented properly. Are there applications you know of that allow you to personally (manually) encrypt text and communicate with another person like GPG does?
You should not be doing manual communications as that opens the door for human error and is time consuming. Also these cryptography protocols are far to complex to easily be used for text.