Solana's proposed replacement for durable nonces would allow cold-key approvals to remain executable after failed transactions. The Solana Foundation's October plan would move asset control to program-derived addresses while preserving the original key's authority to approve actions. Operators would need to migrate assets or permissions and confirm application compatibility with the new signing path. Durable nonces remain usable, and the Foundation has neither set a removal date nor chosen between Anza's Programmatic Signer and Blueshift's Vector. The roughly six-month migration window depends on a suitable replacement being ready, audited and live on mainnet.