[AlexandrB]

> In practice, I have yet to see anything concrete, but I haven't exactly been looking hard.

"In theory yes, in practice no" - sums up every explanation I've seen of whether blockchain technology could be applied to a particular problem. I still haven't seen a "killer app" that's not better suited to a traditional database.

Bitcoin became useful because it's an unregulated currency that has enough acceptance to be liquid and enough anonymity to be used for clandestine purposes. As soon as you try to use blockchain tech for "traditional" transactions you end up eating the computational cost of a distributed ledger for no apparent benefit.