Recently, people keep getting confused by terms like "data availability, ordering, finality."

I personally follow one line: Can the record you see be verified by others (is the data there), who determines the sequence (how is the queue ordered), and whether it can be overturned in the end (does it count as final).
These three issues have actually always been linked together, just at different layers.

By the way, a quick rant about the on-chain data tools' criticism of "lagging tags / being misled":
Honestly, what you see as a "wallet profile" is often just a post-hoc sticker, and taking it as causal can easily lead to pitfalls.
Now, when I look at on-chain data, I prefer to ask first: if this information gets proven wrong tomorrow, is it a problem of ordering or finality...
It's like auditing or queuing for a number.
Anyway, don’t be scared by the terminology—just focus on the main thread of "can it be verified, who decides, can it be reversed."