I used to work in a small startup. We buid .a system that collects sound of water passing in public water distribution network, to identify water leaks.
The company had a few owners, and most of them non computer science people (administration, markting, eletronic engineering backgrounds), and would always sugest the use of blockchains, to store the sound samples, and metadata, just because was the cool term at the time.
Since it would not add anything to our business model, and would come full of techical hurdles, I would always opose, wath lead to the creation of the sign.