The Zcash NU7 network upgrade is scheduled to activate on November 6 at block 3543405, permanently freezing approximately $16 million worth of ZEC remaining in the legacy Sprout privacy pool. As of Thursday morning, roughly 12,226 ZEC remained in Sprout at a price of $1,300 per coin. Once NU7 goes live, version 4 transactions — the only format capable of spending Sprout tokens — will be rejected, rendering those funds inaccessible even with valid private keys. ZIP 2003 preserves the theoretical possibility of restoring access through a future upgrade, though the specification warns that withdrawal functionality may never be re-enabled. The NU7 upgrade also reduces Zcash's target block time from 75 seconds to 25 seconds, marking a significant shift in network throughput parameters.