Because major version upgrades for sensitive infrastructure are just not simple. There is a lot that can go wrong. Postgres lets you do this step manually to av

Because major version upgrades for sensitive infrastructure are just not simple. There is a lot that can go wrong. Postgres lets you do this step manually to avoid losing your production data. I mean look at what happened yesterday with people just installing any update automatically. Critical infrastructure maybe should need a manual process just to make sure people do the right thing