Update
Zcash Sprout Pool Freeze Proposal
Zcash's proposed NU7 upgrade would freeze spending from its oldest privacy pool, Sprout, which held about 22,309 ZEC as of October 17. The mainnet activation decision remains pending, with a planned final decision on October 20. The NU7 deployment specification, proposed by Daira-Emma Hopwood, would reject version 4 transactions from NU7 onward, leaving Sprout holders unable to move their funds on the upgraded network. The freeze would affect all version 4 transactions, including transparent-only and Sapling transactions, and would leave Sprout's remaining balance in issued supply.