As a guy who had installed vanilla Debian on a bunch of QNAP and Synology NAS boxes I don't understand what exactly is the reason why anyone would want ZFS. The

As a guy who had installed vanilla Debian on a bunch of QNAP and Synology NAS boxes I don't understand what exactly is the reason why anyone would want ZFS. The thing is completely unintuitive when something breaks and also there are slight incompatibilities between the current implementations (which will bite you hard when you are trying to recover an failed array). The whatever filesystem you like on top of LVM2 on top of mdraid is a setup that has reasonable layering and one can understand each layer well enough to troubleshoot or performance tune that particular layer. With ZFS, you just have this neat, shiny, complete black box that does something in slightly incompatible ways.