I was thinking, you don't really need blockchains for composability/interoperability, you just need open APIs

permissionless composability, blockchains do provide

but if there were theoretically some non-blockchain tech that just exposed open data, and the end-result product that takes advantage of this data is the same, then the blockchain part would not be necessary for the end product

smart contract blockchains provide:
- network enforced standards
- permanent distributed storage
- incentivized distributed compute
- compulsory distributed work compensation
- intrinsic payment system

/bettik founder /outercorps stalwart | ex-binance, ex-celsiusX

“compulsory distributed work compensation” is the chain’s native coin - users of the network must compensate those who do the work (data storage and compute time) by paying a network fee. 

this built-in payment system is what makes smart contract blockchains so much more powerful and robust compared to simple distributed data networks

wdym by the 4th one? PoW?

Not saying blockchains are pointless or anything, just that the composability benefit can *theoretically* be achieved without them