Similar to this question, for which I think it is not clear enough, I'm interested when a transaction is considered practically confirmed. My question is:
What metric is used to measure transaction confirmation confidence in a scenario where the coordinator will be offline?
The reason why I think the linked question does not answer my question properly is that it talks about a rule of thumb that reminds me of the example given in the whitepaper (select 100 random tips and see if they reference your transaction). What bothers me is:
Why 100 random nodes? Why not a 1000? Who and why set the metric? Is it similar to 6 blocks in BTC or 12 in ETH (that is, just a rule of thumb)?