I always had high hopes for SSDs to come down in price enough to rival spinning rust, but it seems we’ve hit a wall around 4TB for the time being. If HAMR drives don’t turn out to be outrageously expensive, I’ll be spinning discs in my NAS for the foreseeable
I recently migrated my QNAP NAS from 20TB single with a 2nd drive to RAID1. It did a rebuild that took just over 48h. Then I added another drive and migrated to RAID5. It did again just over 48h rebuild. So it’s not too bad.