Zcash NU7 Shortens Block Intervals, Freezes Sprout

TLDR Zcash activated NU7 at mainnet block 3,543,405 on November 6 at 02:34 UTC. The upgrade reduced target block spacing from 75 seconds to 25 seconds. Zcash reduced its per-block subsidy while preserving its existing issuance schedule and supply cap. The network now reserves 60% of transaction fees for future issuance, leaving miners with 40%. NU7 disabled version 4 transactions, making approximately 12,224 ZEC in Sprout unspendable. The upgrade increased theoretical Orchard transaction capacity while introducing limits to protect lightweight wallets. Zcash activated its NU7 network upgrade on November 6, reducing target block intervals from 75 to 25 seconds. The upgrade went live at mainnet block 3,543,405, mined at 02:34 UTC. The activation introduced faster block targets alongside changes to mining rewards, transaction fees, and shielded transaction processing.

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