A lot of people have not seen that every year backblaze.com publish their complete hard drive failure rater for each year.
This has data from their 235,608 hard drives and they publish it every single year. Though do note that a lot of the data is from various ages, so it can be tough to get apples to apples comparisons.
Probably the most useful article they have is about hard drive SMART data, and what is a good indicator of when a drive is dying:
^this article is absolutely worth a read!