Someone asked me again whether blockchain builders and bundles need to understand this stuff.

I feel that retail investors only need to know this much: the transactions you send may not be included in the chain in the order you want; they might be bundled together and inserted into a block all at once, and who goes first or last inside can be arranged.
So don’t blindly believe in “I successfully front-run / I’m first in line.”
Honestly, what you really need to watch out for is: don’t chase during periods of low liquidity, don’t use overly aggressive slippage, and don’t force your transactions during the noisy few minutes of breaking news.
Recently, the unlock calendar has been brought up again to discuss sell pressure anxiety.
Actually, many times it’s not the unlock itself that’s scary, but that during that period, the chain is more congested and easier to get sandwiched, which can break your mindset first.
Anyway, I now treat it as just noise in the trading environment—avoid it if you can.