When you purchase a server (fleet), you get a long warranty with it. Generally 3 to 5 years. So you expect this fleet to stay in service for <=5 years mostly.
Unless you burn through your SSDs, you're very unlikely to hit this event.
When these servers' continue to be used and disks all start to fail at the same time, this will obviously stink.
The bathtub curve is not like this. You can feel that.