Recently, the community has been discussing data availability, ordering, finality—so many terms that it's overwhelming. Basically, I follow one principle: who do you trust to do the "bookkeeping + ordering," and whether you can review the process if something goes wrong. Data availability means not just giving you a hash to fool around with; at least it should allow people to access the contents of the ledger. Ordering is about who goes first and who goes last, determining if you've been front-run or sandwich-attacked. Finality is whether this transaction is truly "settled," so it doesn't get reversed after a couple of hours. I've seen many blockchain game economic collapses—when inflation kicks in, studios come in, and token prices soften, with on-chain ordering that favors front-runners, player experience spirals downward... And then governance keeps issuing incentives to "pull data." What I've learned isn't techniques, but rather to first ask who takes the blame in the worst-case scenario and how to audit the records.