I know that this idea nugget comes up time and time again when discussing drives, but I'm working on large storage systems for over 10 years now and dealing with the drives and their reliability and have yet to see such an occurrence.

I've dealt with deployed systems that had (in many different clusters) a total of upwards of 100K HDDs and also with 10K SSDs and for extended periods.

I saw tons of drive failures of many types but never even once did I see two or more drives of the same batch fail soon one after the other.