Fuel Labs announced the launch of a new Ethereum underlying language, Yul +, as an experimental upgrade to Yul, which will add various QoL features to Yul, a low-level intermediate language for the Ethereum Virtual Machine. Yul is a low-level intermediate language written by Solidity developers to further optimize compilation goals. It is simple and has a practical low-level syntax that allows developers to be closer to the original EVM than Solidity, and has the potential to optimize gas efficiency. Fuel Labs used Yul to implement the first open beta version of Optimistic Rollup. The addition of Yul + will make the code clearer and more efficient.