Odd. I am thrashing the disk of my two hetzner servers with with massive amount of writes and reads for http://searchcode.com without any issues over 2 years. One takes care of HTTP/DB and the other the search index.
The DB server has pumped over 10 TiB of data in the last 80 days (mostly non cached) and the index is rebuilt constantly and well over 1.5 TiB in size.
Anecdotal I know but another data point to consider.