There's a lot of "never let your drive spin down! They need to be running 24/7 or they'll die in no time at all!" voices in the various homelab communities sadly.
Even the lower tier IronWolf drives from Seagate specify 600k load/unload cycles (not spin down, granted, but gives an idea of the longevity).
Is there any (semi-)scientific proof to that (serious question)? I did search a lot to this topic but found nothing...