OpenPGP uses CFB mode. It has the very useful attribute of being self synchronizing. If you have an encrypted file with bad sections you can recover the data past those sections. That is the behaviour you want if you are encrypting backups which is the sort of thing GnuPG is routinely used for.

I give an example of this vs what age does in this article:

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