Right, but the article under discussion here is from over a decade ago and might well have been targeting older practices that hadn't adopted this perspective y

Right, but the article under discussion here is from over a decade ago and might well have been targeting older practices that hadn't adopted this perspective yet. The original goal for OID was a bit like UUIDs, but just at the cluster level rather than truly global. Someone steeped in that background and focused on "tuning", where you would consider things like storage consumption and index efficiency for int4 vs int8, might well have baked OIDs into a URL while dismissing the uuid type as extravagantly expensive.