Could this be a ZFS thing, as I did see in the change log that ZFS was updated? I am actually seeing a perf degrade when copying large files to my cache pool, which is ZFS. Standard SATA SSD cache pool with 2 Samsung Evo 850s(1TB) and 2 Samsung EVO 870s(1TB) in a RAIDZ1. Whole network is 10G and it struggles to get to 200MB where it used to get into the 300s with no problem. Not critical as this is just a home use case for me but thought I would lend SuberSeb some support as it seems I am seeing something similar.