Another comment from a technical perspective: Fabric doesn't even solve double spends. Say a logistics company uses Fabric to send diamonds to track (the proto

Another comment from a technical perspective: Fabric doesn't even solve double spends. Say a logistics company uses Fabric to send diamonds to track (the prototypical blockchain business use case). Logistics Worker Alice goes to reserve Cargo Container C to ship her diamonds in. At the time, Logistics Worker Bob attempts to reserve Cargo Container C -- at the same time -- to ship his diamonds. This is a double spend (Company Cargo Container C -> Alice, Cargo Container C -> Bob). All Fabric does is takes both transactions, issues the txns to the "Orderer" and then both transactions get put into a block and pushed out to the nodes. The nodes are then left to deal with the bloat of having two transaction.