> It's the big trend in inventory, order and supply chain management at the moment with companies investing millions into it.

No, it's not. Blockchain is an implementation detail and implementation details don't matter. It's as asinine as choosing a flight based on whether a the airline uses Slack or Teams for internal communication. You don't see new airlines being founded based on the fact that AWS is the future. You don't get emails by your bank saying they're better than their competitors because they use PostgreSQL.

The fact that companies advertise implementation details means that the implementation detail is a fad. The fact that you don't understand that blockchain is an implementation detail means you don't understand blockchain.

A blockchain is a data structure. Other data structures are linked lists, arrays, queues and hash tables. Unlike blockchains these are actually used by developers, some of them on a daily basis. When is the last time you've heard a company created a buzz around double linked lists?

The only reason advertising using a blockchain makes sense is when using a public blockchain, but running a public blockchain without a cryptocurrency does not make sense as there is no incentive and you've already admitted that there's nothing to crypto currencies.