Just woke up and saw someone arguing again about block builders, bundles, and such, saying that retail investors who don’t understand will get "sandwiched." I really don’t think it’s necessary to push yourself to become a researcher… The basic level is: knowing that your transactions may not go directly into a block, they might be "packed" and queued by others first; some wallets/routes will help you use private channels to reduce the chance of being watched and copied, but it’s not a get-out-of-jail-free card.

What I care more about is not clicking randomly on signatures, regularly cleaning authorizations, only keeping enough funds in hot wallets, and if I really want to try new things, isolating the wallet for funds. Recently, with staking and shared security where yields are layered, people say it’s a "nested doll," and I just step back first: if the source of the yield is unclear, no matter how much you bundle and spend, it won’t save you.
Anyway, take it slow; it’s more practical than researching a bunch of jargon.