Bitcoin Core 31.0 is out, launching on April 19th. This version introduces the new `-privatebroadcast` option. Simply put, when you send a transaction, you can choose to broadcast it exclusively via Tor or I2P networks, ensuring your IP address isn’t exposed to any nodes. Even if you send two unrelated transactions, the system will use two separate connections to broadcast them, making it impossible for outsiders to link them to the same person. In other words, starting from 31.0, regular users can enjoy broadcast-layer privacy that’s almost at the level of a coin mixer—completely free and natively supported. Other key updates include: Mempool has been rewritten into a "cluster mempool" architecture, making block-building logic more miner-friendly; RBF replacement rules have been tightened, eliminating edge cases that previously could degrade mempool performance; and the fee estimator’s minimum unit has been reduced from 1 sat/vB to 0.1 sat/vB—greatly improving estimation accuracy during low-fee periods.