These are features I actually use liquibase for. That's why I know about them.

About rollbacks: yes, they are not always useful and you can think of ways to avoid them. But these days when you can rollback a docker application upgrade with a few commands/clicks, this way you can also roll back the DB changes. Not all the changes require this, but there are many ways a schema upgrade can go. Datapoint: changing stored procedures/functions that should match the calling application's version. Yes, not everybody uses logic in the DB, but sometimes you need that performance.