If youre interested in EC you might want to consider larger multi dimensional cases. Think of encoding not just across spindles, but another failure domain like rack, room, DC, or region. The goal being to tolerate common component failures, and larger system failures (or partitions) as well. A nice intro https://chameleoncloud.org/blog/2023/12/12/design-considerat...
You also need to take into account other constraints, like recovery time. If one of your companies datacenters gets destroyed, then it's great to be able to recover from the other 6 using clever erasure codes, but if that recovery requires reading every byte of data in every other DC and sending it over the network, it's gonna take 6 months+ to transfer all that data over a cross ocean fiber which might only be 1 Tbps.
