Zcash developers have proposed reducing the block interval to 20 seconds.

Zcash developers ValarDragon and Evan Forbes have submitted a draft proposal to reduce the target block interval from 25 seconds to 20 seconds, and to include it in the next round of community voting and NU7.1 network upgrade discussions. The proposal states that this would shorten the initial transaction confirmation wait time and improve the experience of offline payments, exchange deposits, and cross-chain exchanges. The developers stated that shortening the block interval will not increase the network's total daily privacy transaction capacity, nor will it change Zcash's existing issuance plans. Zcash's NU7 upgrade went live on the mainnet on Friday, reducing the target block interval from 75 seconds to 25 seconds and introducing a network sustainability mechanism that redirects some transaction fees back to future mining rewards while maintaining a supply cap of 21 million ZEC.