We (the denizens of pgsql-hackers@postgresql.org) didn't see any AIX users or developers or other interested parties in our community... There was a group in France, but they disbanded... However, after AIX was dropped in the PostgreSQL 17 development cycle, suddenly we heard from IBM who run products on it. So perhaps it will make a comeback in 18? That was the latest idea, anyway, let's see.

https://www.postgresql.org/message-id/flat/CY5PR11MB63921AB0...