We used gopass at one of the earliest startups I worked for until we realized that all secrets needed to be manually rotated every time an employee left. I still use gopass for personal use but the idea of using it in a teams environment is just untenable unless you have nothing more than a handful of secrets to worry over.
Age doesn't fix this. It just tries to make things simpler but in return you lose out on a bunch of standard interops that have propagated around GPG.
I was legitimately excited about a new secrets backend until I understood nobody is actually writing it to solve real world problems. It largely appears to be a case of "writing it to do fewer things because that's what Unix hackers like".