How much value do you give to being tamper proof, to having multi party untrusting infrastructure, to being decentralized? How much do those add up to in your n

How much value do you give to being tamper proof, to having multi party untrusting infrastructure, to being decentralized? How much do those add up to in your net cost calculation? How do achieve for these with your alternative solutions? What does that cost? The airplane manufacturer doesn't want to expose their database to their partners. They also don't want to write bespoke applications and services with their partners and doesn't really expect them to adapt to those interfaces that in turn front the database. None of this helps reconcile wtf happened across systems when sides disagree. Having a common distributed way to share a ledger is a valid problem to have and a blockchain is a valid way to solve that problem. Contracts further sweeten the pot.