A few SDN-mentioned pools even now have an “operator” authorization. Of these, two belong to extremely old, now-unused versions of Tornado Cash. The remaining pools possibly have newer, immutable versions, or were being applied so small which they were being very likely overlooked during the May 2020 closing update. In https://dalligstore.com/2024/09/29/the-ultimate-guide-to-tornado-cash-secure-and-anonymous-blockchain-transactions/