Since Dropbox episode we don't tell people that nobody has any usage of their product.

Of course, us maximalists all know Bitcoin is the pinnacle and can never be improved on. /s

It can be improved on, but blockchain is REALLY REALLY hard

Except any reasonably complex interactions between parties which may or may not be accounting applications yet still need a distributed system of trust.

Which includes a few trillion dollar industries.

Registered assets are always more secure and cheaper than bearer assets. And if you needed bearer assets, there's multisig, which does everything turing complete code does, cheaper and more secure

Its the interactions between assets, agreements and trusted devices which opens up possibilities greater than the scope of this thinking.

I see. What blockchain does the NYSE use?

I don't talk to their developer teams so I wouldn't know. I wouldn't expect them to move quickly enough for that to have been publicly announced by now. My guess is either ethereum or hyperledger fabric depending on how much of their system they would want completely public. Queries per second is a huge concern there too, so it might be a while off for NYSE for this reason alone.

You may be right about this.