This is a full release that upgrades Substrate / Cumulus / Polkadot version to v0.9.17 which includes some performance improvements. This version also adds the support of transferring Statemine asset back to Statemine and some improvements on LiquidStaking protocol and Stablecoin protocol.
Release Note: https://github.com/AcalaNetwork/Acala/releases/tag/2.4.0