Recently, I keep seeing people talk about "data availability, ordering, finality" as if it's some kind of mysticism. In reality, just focus on one main thread: the step you're taking on the chain—can it actually be "seen," "recorded in the same order," and "cannot be changed later"? If you can't see it = no one will be able to review it later; if the order isn't stable = you think it arrived first, but it was actually inserted later; if it's not final enough = you'll always be worried, like writing a draft and not saving it.

Now, with AI agents and automated trading becoming popular again, the narrative is quite hyped, but what I care more about is the default assumptions they make when interacting with the chain: they think they're dealing with a "stable world," but in reality, ordering can be manipulated, finality can have delays, and there are many security pitfalls. Honestly, I prefer to confirm more slowly rather than wake up the next day to find that last night's "transactions" were just illusions... Anyway, get this thread straight in your mind first, and don't be intimidated by the terminology.