I heard this exact argument about blockchains. Or has that been a success with tons of productive uses in your opinion? At some point, I'd like to hear more t

I heard this exact argument about blockchains. Or has that been a success with tons of productive uses in your opinion? At some point, I'd like to hear more than 'trust me bro, it'll be great' when we use up non-trivial amounts of finite resources to try these 'things'.