Recently, I saw everyone talking about block builders and bundles. Honestly, retail investors don't need to learn all the tricks involved. Just know: when you click "Confirm," the transaction may not be included in the block in the order you expect. Someone might bundle several transactions together to insert them, mainly to profit from your slippage or to抢 your position. For someone like me who does backtesting and executes scripts, the takeaway is twofold: don't aggressively trade on pools with low liquidity, and set conservative parameters (slippage, limit orders, batching); if you encounter abnormal trades or get stuck, switch to a different time period or just stop trading. Developers who work with modular and DA layer systems are excited, but for user experience, it ultimately boils down to the simple question: "Will my order get exploited?" That's all for now—better to pay fewer tuition fees.