The only practical thing I can think of is things where businesses have to cooperate on something and pay a third party some amount of money to be the trusted l

The only practical thing I can think of is things where businesses have to cooperate on something and pay a third party some amount of money to be the trusted ledger. Like, for example, partnerships to exchange customer loyalty points. But even that has perils, as you could set an exchange rate but somebody has to administer/manage that. And once you're back to a managed ledger, you might as well use contractual terms for trust and a database since a blockchain isn't adding much value.