I think this stuff sort of depends on how often you upgrade drives. I bought 2 4TB drives in 2016 running in a ZFS mirror, spinning 24/7 as I had heard that the hardest time on a spinning disk is the initial spin up from cold boot, or sleep. (I’m not sure is this if true anymore, but I had disabled sleep on the drives, regardless)

4 years later, I bought 2 10TB drives to upgrade my storage capacity, and relocated the 4TB mirror to media content, and stuff that was replaceable if the drives failed, so I didn’t need to really back it up.

Juuust now, at the end of 2025, 1 of the initial 4 TB drives failed and now my ‘old’ SDS mirror is in a decreased state running on 1 drive, but the drive lasted almost 10 years.

I bet they average home lab or self holster is probably upgrading and replacing their drives with higher capacity more often than 10 years, so they probably wpuld never actually see a drive fail in real life use.