I think the #1 reason blockchain doesn't work is very simple - the technology is broken beyond fixability. This article is two years old, but the same variations of these excuses always come up when the crypto ideologues are grilled on why their utopiaic vision hasn't come about, for all of blockchain's existence. Blockchain is awful for most things compared to a centralized or distributed database: it is inefficient, untrustworthy due to decentralization, a huge resource hog, and morbidly complex to implement.
The only good use cases that come to mind is if there is some particular reason for you to evade the conventional and easier systems of communication and storage. The lesson is: you should evaluate technology on its merits, not its politics. Three classic sources on the blockchain question immediately come to mind:
The only good use cases that come to mind is if there is some particular reason for you to evade the conventional and easier systems of communication and storage. The lesson is: you should evaluate technology on its merits, not its politics. Three classic sources on the blockchain question immediately come to mind:
http://doyouneedablockchain.com/
https://imgur.com/a/RlUj9Ed
My personal favorite:
https://twitter.com/vgcerf/status/1019987651301081089