Selfhosted
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For minor version upgrades, the database remains binary compatible. Nothing to do.
The dump/restore required during major upgrades allows format changes which enable new features and performance improvements without dragging around cruft forever to stay backwards compatible.
For professionals running PostgreSQL clusters in production there is a way to cycle in the new server version with zero user-visible downtime.
It's just weird that it doesn't do the dump-restore automatically when it detects data from an old version.