Best feature of OpenBSD, that is NOT found in Linux, is the ability to do initialize, manage, replicate, and offline SDD/HDD drives of different RAID controller

Best feature of OpenBSD, that is NOT found in Linux, is the ability to do initialize, manage, replicate, and offline SDD/HDD drives of different RAID controllers using a single CLI command. Vendors of RAID/SCSI/SATA controller are unable (and more often unwilling) to make it work in Linux ... together.