Just now I saw someone tossing the blame for a failed trade onto “the builder blacklisting me”… let me make a self-deprecating joke first: I stare at nonce and the packing order every day, and I wouldn’t dare be that certain. To put it plainly, retail users really don’t need to research block builders and bundles to the level of writing client code. Knowing these three things is enough: 1) When you see the claim “I sent first, so why did they execute first,” it’s often because someone used a bundle to pack a series of transactions into the same block, and the order can be arranged; 2) When volatility is high, don’t blindly trust that “adding a bit more gas means you’ll win.” In an MEV environment, it’s all about the execution path—failure or getting sandwiched isn’t unusual; 3) For important actions (swapping large amounts, closing out positions, cross-chain), try to do them in smaller batches, set slippage properly, and don’t force it when the network is congested—better to go slower.

Recently, the whole “re-staking and shared security” yield stacking setup has been getting criticized as “Russian nesting dolls,” and I actually think it has the same flavor as bundles: the more layers there are, the more conservative you need to be about who’s queued in front of you and who gets priority. Anyway, whenever I see the words “guaranteed profit” now, I get shaky. That’s it for now.