This analysis provides a summary of the research paper Atomic Execution is Not Enough for Arbitrage Profit Extraction in Shared Sequencers , where we study the impact of shared sequencing for cross-rollup arbitrage profits. In particular, we focus on atomic execution and derive the conditions in which atomicity is profitable for arbitrageurs. This highlights that profits do not always improve under atomic execution, and thus, this feature alone is not enough to convince both arbitrageurs and rollup operators to switch to a shared sequencing regime.