So if coinbase was open source, and you had forked it to add BSV support, that’d mean coinbase was decentralized?! Open source/forkability != decentralization. The whole point of decentralization is no particular entity gets to decide something for everybody, and that’s precisely why it’ll take a long long time for regulators to be okay with it.
It will be much better if the crypto community moved to decentralized exchanges like Bisq.