10 000 RPM SAS drives absolutely still exists and are relevant. I got my last batch 2 months ago or so.
Those SAS drives have nice capacity (2,4TB) and you don't need to worry about DWPD.
It would have to be a highly sequential workload for hard drive performance to not be a problem, but that means it's also a workload that's well-suited for QLC SSDs that are cheaper per GB up front and draw less than half the power and are faster in every way. If your worries about write endurance are at all realistic, you must be averaging upwards of 50MB/s of writes over the entire lifespan of the drive, meaning your hard drives are spending at least 20% of their service life actively writing data.