Great reply :) Your last two points are a little weak. Ultimately ZFS does more stuff, so on an SSD its going to be slower than a filesystem which doesn't hav

Great reply :) Your last two points are a little weak. Ultimately ZFS does more stuff, so on an SSD its going to be slower than a filesystem which doesn't have all these extra features if you aren't using them. I think there's a trade-off to be had. All software has bugs, especially ZFS. You could argue it is easier to developer, test, and maintain individual device-mapper building blocks.