Lately I keep seeing a bunch of words like "data availability, ordering, finality" thrown around.

Actually, don't be scared. I have my own main line: at the moment you trade or interact, who is really deciding the "sequence" and how long it takes for something to be truly stable.
If the order isn't clear, it's easy to get front-run or suffer from slippage, which is disgusting; if finality isn't solid, a rollback can instantly blow up your confidence.
Data availability is more like the foundation, meaning whether on-chain data can actually be seen and verified by everyone—don't end up with just "trust me" at the end.
By the way, thinking of blockchain games, with inflation + studio + token price spirals, it's also about "who can change rules/order at will" that amplifies the problem.
In the end, everyone is just left running faster.
Anyway, I stick to my approach: keep positions small, slow down, first figure out what kind of uncertainty you're bearing...
What about you?