People don't use git crypt nearly enough unfortunately.

Agreed. I use and love git crypt, but it doesn't get enough use. I think because it's easy to screw up gpg keys. Most of my uses (for one to three devs) have become symmetric keys shared out-of-band instead of using gpg keys because we've had lots of onboarding pain even from people who are quite competent. There are just a lot of sharp edges in gpg that you don't know when you don't know.