Lately I keep hearing people talk about block builders, bundles, as if you can't trade without understanding them. For retail investors, I think knowing what's "enough" is fine: your order may not be added to the chain in the order you expect, someone might bundle or cut in line, especially during hot trends on the chain or when snatching new tokens, slippage and execution prices can become very unpredictable. Forget it, to put it plainly, don't take execution for granted, when volatility is high, tighten your positions and stop-loss levels, don't chase battles.

As for whether to study the details of MEV... I personally only remember two points: don't use overly outrageous slippage, and don't chase confirmations during congestion. Recently, with cross-chain bridge thefts and oracle errors, the community has started to "wait for confirmations" again, and I agree—slowing down really won't kill you, rushing in makes it easier for others to bundle against you.