I don't have the experience with smart contract development to have an informed opinion on this. My guess would be that others could extend the protocol, but t

I don't have the experience with smart contract development to have an informed opinion on this. My guess would be that others could extend the protocol, but the challenge would be to get the extension widely adopted. For example, ERC20 is the primary token transfer protocol on Ethereum, and there are various new token transfer protocols that are supersets of ERC20, and add useful new functionality, but they have not yet gained the widespread adoption to become useful the way vanilla ERC20 is.