It's not for saving storage. It's for making sure it will actually not overflow. End number doesn't matter, what matters is developers thinking about how long

It's not for saving storage. It's for making sure it will actually not overflow. End number doesn't matter, what matters is developers thinking about how long data should be stored and what data should be stored. Not doing that analysis and overprovisioning 4x will just cause disaster in 2 years instead of 6 months.