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By the way, the guys at Backblaze have posted a new report, this time copmparing its SSDs and HDDs:

Are SSDs Really More Reliable Than Hard Drives?
https://www.backblaze.com/blog/are-ssds-really-more-reliable-than-hard-drives/

Solid-state drives (SSDs) continue to become more and more a part of the data storage landscape. And while our SSD 101 series has covered topics like upgrading, troubleshooting, and recycling your SSDs, we’d like to test one of the more popular declarations from SSD proponents: that SSDs fail much less often than our old friend, the hard disk drive (HDD). This statement is generally attributed to SSDs having no moving parts and is supported by vendor proclamations and murky mean time between failure (MTBF) computations. All of that is fine for SSD marketing purposes, but for comparing failure rates, we prefer the Drive Stats way: direct comparison. Let’s get started.

As you can see, SSDs seem to win by a mile, but there's quite a difference when it comes to the age of the drives. So, the guys at Backblaze did an apples to apples comparison:

Things don't look so different now, do they? The ressemblance is even bigger when you put them in a graph:

As they state:

"As the graph shows, beginning in 2018, the HDD boot drive failure rate accelerated. This continued in 2019 and 2020 before leveling off in 2021 (so far). To state the obvious, as the age of the HDD boot drive fleet increased, so did the failure rate.

One point of interest is the similarity in the two curves through their first four data points. For the HDD cohort, year five (2018) was where the failure rate acceleration began. Is the same fate awaiting our SSDs as they age? While we can expect some increase in the AFR as the SSD age, will it be as dramatic as the HDD line?"