Recently, there has been talk about block builders, bundles, and so on. To put it simply, retail investors really don't need to push themselves to become MEV researchers… You just need to know: the transaction you send out isn't "directly to miners/validators"; it might be packaged, reordered, or sniped along the way; a bundle is someone packing a series of transactions to give to the builder, aiming for a more stable inclusion in the block in the order they want. Knowing this level is enough for you to make risk choices.

My bottom line is: don't blindly use default routing to rush during high volatility or maintenance windows, especially around the time of major chain upgrades or downtime. I don't care whether projects migrate or not, what I care about is the mempool becoming messier, and transaction quality getting worse… Slippage and the chance of being sniped will go up. Too much information is also pretty annoying; my filtering method is simple: only look at "Will this transaction become more expensive/slower/easier to be sniped," and I skip discussions unrelated to these three. Anyway, the money is mine.