I think DFINITY should also consider building and releasing the first SNS-operated dapp as a proof of concept.
Just like https://nns.ic0.app was a POC for Internet Identity, I think we should have one for SNS. This way, users and developers have a concrete thing they can play with to understand how this will actually work in practice. I doubt any serious project will give up control of their dapp to an untested system like the SNS without first seeing a working example.
Maybe the proposed People Parties dapp could be the first to use SNS? It’s rather experimental and will probably need a lot of iterations to get right, which could be a useful test of SNS governance.