It would be survivor bias if I ignored the failing disks. However, all of these are from machines which are in my family from the beginning. I don't have a precise tracking of all the HDDs we ever had, but I remember maybe 4-5 of out of maybe 20 failing over the course of ~30yrs, which is not incredibly awesome, but far from ‶unheard of″.

It depends more on manufacturer/series/batch. In my experience good HDDs easily last 10+ years.

I have multiple consumer grade drives made in 2008-2010 that have been used a lot and have more than 7 years of recorded time of the head flying over the platters and they still work fine. Some with zero reallocated sectors and others with 1-10 in the last decade. But the number hasn't changed for 3+ years in any drive so it doesn't bother me.

Before you say it, of course I keep backups of everything. That's why I still use decade old hardware without much worry.

i have two NAS 3TB WD Red drives that are about 10 years old and still going stong