No, Thomas was talking about rage. https://github.com/str4d/rage

Too late to edit my comment: I had misinterpreted “a GPG alt” as meaning a GnuPG alternative implementation of OpenPGP. Only after reading the parent and other ancestral comments did I realise that Age was the project being discussed and that it’s an alternative to OpenPGP – not just GnuPG.

Thanks for the correction. I hadn’t heard of that project.