Currently using what are effectively white label Seagate Exo's Drives in my main Unraid server.
All purchased 2nd hand, and out of the 100+ SAS drives I have purchased only 3 of the HGST drives have failed, which thankfully I had replacements for.
I would love to get my hands on enough of these to replace all my drives in my servers but somehow I don't think Seagate are going to send 71 of them to a random nobody on a forum, 63 would be in use and 8 would be spares.
I don't think I would ever have to worry about space again, although to be fair I still have around 35TB free on my server currently out of the 132TB it has usable.