"it happens to be immune to the particular failure mode which happened here"
What exactly do you mean by "immune to the particular failure mode"? Is bitcoin immune to server or data center outages? Perhaps if you very narrowly limit which ones you are talking about to the bitcoin network per se.
Its not immune, no system is absolutely immune to failure, but it is highly resillient because of the wide distribution of its nodes and the fact that each node carries a full copy of the ledger.
