My home NAS drives are currently hitting the 5 years mark. So far I'm at no failures, but I'm considering if it's time to upgrade/replace. What I have is 5 x 4T

My home NAS drives are currently hitting the 5 years mark. So far I'm at no failures, but I'm considering if it's time to upgrade/replace. What I have is 5 x 4TB pre-SMR WD Reds (which are now called the WD Red Pro line I guess). Capacity wise I've got them setup in a RAID 6, which gives me 12TB of usable capacity, of which I currently use about 7.5TB. I'm basically mulling between going as-is to SSDs in a similar 5x4TB configuration, or just going for 20TB hard drives in a RAID 1 configuration and a pair of 4TB SATA SSDs in a RAID 1 for use cases that need better-than-HDD performance. These figures indicate Seagate is improving in reliability, which might be worth considering this time given WD's actions in the time since my last purchase, but on the other hand I'd basically sworn off Seagate after a wave of drives in the mid-2010s with a near 100% failure rate within 5 years.