I once had to top up margin fast, sent stablecoins and the transaction hung even after I raised the fee. The screen showed pending, I could not tell how long it would take so I did not dare switch plans. When the funds landed the position was already liquidated, I lost because I was late not because my call was wrong.
After that I learned to treat latency as an opportunity cost, because it eats your right to choose timing. Certainty is even more expensive, you need to know the window in which a transaction will complete so you can make the next move, without a window you are just compounding risk.
In personal finance, a regular transfer is cheaper but nobody promises an arrival time, an instant transfer costs more but comes with a commitment. When you need money to land before a deadline, what you are really buying is certainty.
I think of it like ordering food at lunch, ten minutes late is annoying, an hour late breaks your schedule. The average can sound fine, but the ugly tail is what ruins plans.
What caught my eye about Mira Network is the idea of turning an SLA into a price sheet across latency and certainty, forcing both into measurable terms that can be checked. It suggests the SLA should state the price for each latency level. Latency should be counted from the moment you send to the moment the system returns a state that is actually usable for an application, and it should be published as a distribution so the tail is visible. Certainty has to map to a level of finality an application can safely rely on, if it is only an early confirmation that can still be reversed then it is still a liability.
To me, durability means keeping promises on bad days, not only on good days. It means independent observation, real time reporting, and automatic compensation when the commitment is missed.
With Mira, I look for whether tail latency is disclosed consistently, whether certainty is tied to real finality, and whether compensation is transparent. If those three hold up, users can finally buy a clear option between fast and certain.