Recently, there's been talk about blockchain builders, bundles, and so on. To put it simply, retail investors don't need to turn themselves into half MEV researchers... All you need to know is: at the moment you click "transaction confirmation," it might not be included in the block in the order you see. Someone might be packaging, inserting, or even sandwiching you to make some profit. The two main things you should do are: try to use reliable wallets/routes (don't randomly click on wild RPCs), and for large or slippage-sensitive orders, split them into smaller ones to avoid giving others an advantage. As for how builders compete or how many layers are hidden inside bundles, I can only say as a governance person: that's the kitchen's back end, we can at most look at the hygiene rating. Oh, and by the way, recently, before and after the main chain upgrade, everyone has been guessing whether projects will migrate. I actually think we should pay more attention to whether "transactions will become more crowded and easier to sandwich," migrating is their business. I don't need to be understood, but I must not put my hand into the meat grinder.