The 2.5Gbe network writes against a RAID-Z1 config of 4 drives puts the sustained write speed below that of most QLC drives.

Recovery from a lost drive would be slower, for sure.

Same response, basically: take a 1000MB/s drive, it takes 120s before it drops down to 20MB/s... where are you going to source 120gigabytes- on a routine basis.

Not saying premium drives dont have their place- but for 95% of people $200/TB ($100 premium over lower tiers) is a waste.