A surprisingly fun game. It exceeded my expectations. I have played it more than I thought I would.

Doesn’t losing a vdev cause the entire pool to be lost? I guess to your point with sufficient redundancy for new vdev 1 drive redundancy whether 3 disks or 5 is essentially the same risk. If a vdev is added without redundancy that would increase risk of losing the entire pool.

From Frank Herbert’s Dune

Any road followed precisely to its end leads precisely nowhere. Climb the mountain just a little bit to test that it’s a mountain. From the top of the mountain, you cannot see the mountain.