Supply chain tracking is a fairly perfect match. An example in production usage today is https://simbachain.com/ and https://www.computerworld.com/article/3439843/how-pharma-wil... and a particularly interesting vaccine distribution database from IBM: https://www.ibm.com/blockchain/industries/vaccine-distributi... - or how about voting: An example in production usage today: https://www.govtech.com/products/utah-county-makes-history-w...
There is the obvious securities trading usages, but that may or may not qualify as speculative. Anyways, you could argue blockchain is a stupid tech for all those reasons and all the startups mentioned in these articles will fail - and fine, maybe you're right. Maybe postgres is better for all those jobs. But these are non-speculative use-cases. If they're the right fit for those problems -- well, I'm not running a crypto startup, so... But in the long expanse of history, I do believe trustless societies will eventually emerge.
The obvious criticism is indeed that these use cases could be addressed—if not with Postgres—with Merkle trees, no? Like (at a quick glance) MediLedger wants auditability similar to (say) Cert Transparency, and is using a “permissioned” blockchain to do that. How that differs from a centralized or partially centralized model like CT isn’t obvious to me.
Perhaps more importantly, though, none of these examples seem like they demonstrate the supposed appeal of “Web3.0”: permissioned blockchains, by definition, do not have truly distributed ownership; the entire bullshit premise of Web3.0 from people like (ironically) a16z is that you get to own “digital assets.” Yet permissioned, partially centralized blockchains—-irrespective of whether Postgres would be a better solution!—-exhibit none of those characteristics, right?
If all the hype around “Web3.0” is just a way of saying “supply chain tracking will be done, at greater cost and complexity, in a distributed manner”, that doesn’t strike me as deserving of all the hype. What broad cultural or economic impacts will it have?
