What a great read. I think the authors here made great hardware and software decisions. OpenZFS is the way to go, and is so much easier to manage than the legacy RAID controllers imho.
Ah, I miss actual hardware.
I enjoyed it as well, i'm also appreciative that they shared their configuration notes here. I've been running multiple data stores on ZFS for years now and it's taken a while to get out of the hardware mindset (albeit you still need a nice beefy controller anyway).