Postgres moved to this model somewhat recently. Two years ago we were talking about doing "the postgres 10 conversion" and now they're up to pg v. 12, or maybe

Postgres moved to this model somewhat recently. Two years ago we were talking about doing "the postgres 10 conversion" and now they're up to pg v. 12, or maybe higher already, I haven't checked. Semi-annual releases are nice, features ship when they are ready, and releases aren't delayed because that feature that's taking just a tiny bit longer than expected, well, it'll be fully baked by next year's release.