Ava Labs engineering director Patrick O'Grady posted on the X platform that Avalanche Cortina 14 has been released and this version (V1.10.14) is backwards compatible with V1.10.0.
This upgrade includes the addition of TransferSubnetOwnershipTx (not activated), adding support for rotating inelastic subnet control keys, and this major implementation change may be included in the next Avalanche network upgrade (V1.11.0). Additionally, upgrades include redesigning validator set management to improve efficiency and adding a PebbleDB implementation.