I feel like your downvotes are undeserved. From an engineering perspective, all Tornado did was add anonymity/plausible deniability to the blockchain--which is all that ZK will do. Maybe there's a question as to whether OFEC will also see ZK as money laundering, but my guess is they won't until it gets to a certain scale and then they will--exactly like Tornado. That limit was ~$7 billion, which is < 1 FTX, and far smaller than the current market cap of Ethereum.