"Auxiliary L2"

I am not very immersed in the Espresso technology. I know that it is not L2, but an auxiliary L2 that makes the entire ecosystem of unified transactions faster, safer, and better interconnected. The project has a good investment of $60 million, including tier 1 funds. There was a campaign to get WL on the project's NFT, where I participated but did not win WL. My opinion on the project is ambiguous. I do not yet understand its usefulness for the Ethereum ecosystem, when there are already fast and inexpensive L2s. Time will tell how Espresso will really integrate into the Ethereum ecosystem.