Recently browsing on-chain transactions, I often hear people say, "This arbitrage opportunity is so sweet." But my first reaction now is: am I seeing an opportunity, or just someone taking a cut of my fee... Essentially, a sandwich is just you clicking confirm once, someone else inserting a transaction first, then another, pushing the price around, and you still think it's just slippage. Arbitrage is similar—path, timing, gas—it's not about eyesight, but about who is closer to the ordering priority. Modular, DeFi layer storytelling developers are having lively discussions, while users are often confused: for ordinary people, the experience boils down to two things—whether they'll be front-run after clicking, and what exactly the paid money has bought. Recently, I prefer to test with limit orders or smaller amounts; don’t treat "finding opportunities" as a default skill—first, clearly map out the loss process before proceeding.