Base is going to be using flashblocks. Because it forces a MEV priority auction by fee and gives revert protection it should reduce their L1 usage too
https://x.com/buildonbase/status/1895223243713458184
"the MEV trilemma posits that MEV will be extracted one way or another – chain designers can only choose between an explicit auction, a spam auction, or a latency auction."
https://writings.flashbots.net/introducing-rollup-boost