Samsung 870 EVO Drives for Cache -- Should I Worry?

[jakeortman]

I currently have a couple 500GB WD Red SA500 NAS SATA SSDs (2.5") in a pair for my cache (btrfs, RAID1). I'm running a bit short on capacity with some docker/media/things I'm doing. I have the option to get a pair of new Samsung 870 EVO 1TB or 2TB drives. I've heard and seen some stories about EVOs of the past having issues with firmware and premature failures. Has that gotten any better? I have some credit at Dell and this is their limited inventory of 2.5" drives, so I'll likely be shopping from there (their selection isn't great, but credit is credit).

 

I'd go with M2, but I want to keep my RAID1 protection and I only have one M2 slot on the motherboard I'm using.