Even if it’s true, that GUI never allowed it (there’re people disputing it), migrating disks between different products from the same NAS manufacturer isn’t wha

Even if it’s true, that GUI never allowed it (there’re people disputing it), migrating disks between different products from the same NAS manufacturer isn’t what I’d call going out of your way. It’s one of the reasons to stay loyal to the brand when you upgrade. If it’s incompatible, it should be rejected at the start, or changed later with tons of communication and proper checks (like blocking you from further sw upgrades until you migrate your array). Randomly breaking it is Synology going out of their way to hurt users.