Zcash Activates NU7 Upgrade on Testnet Ahead of November Mainnet Target

The testnet window is the substance here: it converts a planned upgrade into something developers can stress-test before committing the mainnet. The 25-second block target is the change most likely to reshape how the network behaves under load, and fee and confirmation expectations downstream of that. Who it touches most is anyone building on or transacting through Zcash, not just miners. Whether the shortened interval holds up under real testnet conditions, and whether the November target survives that review, is the open question.