[justinmeiners]

Not really. Just probability. If you have fully redundant services then ALL of them have to go down to have an outage. Suppose you 5 copies with 75% uptime each. The probability that all of them are down is 0.25^5 ~ 0.0009

Now of course that assumes they are uncorrelated, but since Sia nodes are distributed across the internet, that's likely as opposed to multiple servers at a few data centers like AWS.

Turns out mortgage bonds tend to be correlated.

[iampims]

They all run the same software stack though, so despite being deployed on diverse hardware, so they can’t claim to only have independent failure modes.

[justinmeiners]

True. It would be interesting to analyze what others aspects are correlated.