PGP does an absolutely dreadful job of key discovery, and further, there is no reason to couple one mode of "key discovery" to a signing tool. Different business domains will have different optimal key discovery architectures.
My guess is that at this point more professional environments (think on the level of "companies and projects") have integrated age and minisign than have integrated PGP, which is striking given how long PGP has had to demonstrate success. In 2025, if you built a new identity system for, say, code, virtual machine or container provenance, or secure messaging, your competent security team would very likely shoot you down.
This is just another instance of the same sleight of hand I identified upthread. It's actually bad that PGP does all this stuff, for the simple reason that different real-world problems have different cryptography requirements. For that reason, competently built systems don't do what the PGP ecosystem does, of fielding a Swiss Army Knife instead of a chef's knife or a table saw. Then the PGP ecosystem tries to ding those tools for not repeating PGP's mistake.