PlanetScale has introduced a new schema revert feature that allows users to revert database schema changes with zero downtime and no data loss. This feature is made possible by VReplication in Vitess, a database clustering and management system used by PlanetScale databases alongside MySQL. With this feature, users can make changes to their database schema without fear of downtime or data loss, treating their database like they treat their code. The feature enables developers to revert schema changes with the press of a button, taking just seconds to restore previous schema states.