Example 1: if you swap some token for BCH on Cauldron DEX, and immediately use that unconfirmed UTXO to pay a merchant, such 0-conf has increased risk of getting cancelled because it has an unconfirmed “anyonecanspend” ancestor.
Example 2: if you put dust in an OP_1 “anyonecanspend” P2SH UTXO and reference it as input in your TX, then any miner monitoring for such “free” UTXOs could sweep it and effectively cancel your TX, so a payment that has any input spend P2SH also has increased risk of getting cancelled.
You selling 100 BCH isn’t going to get processed with 1 confirmation either It would need a bunch of blocks. So your base assumption is false, “a confirmation” is not what is targeted, instead a certain amount of (proof of) work is.
Faster blocks doesn’t actually give people what they hope it gives them, this is a good example where hope outstrips knowledge. If you talk to many people in the community you’ll notice the pattern, they expect a lot of issues to be solved with 1 min blocks that upon critical review, there is no reason to believe they will be solved with 1 minute blocks.
These examples really just show the problem of finding actually beneficial outcomes that are not trivial to debunk, BCA here creates completely imaginary situations that not a single wallet today is capable of producing and claims it is a problem that needs a solution. While in actual fact not a single human ever had this problem, and as such doesn’t need solving. They can’t have had this problem since no software exists that does this, or anything close to it.
And on top of that, the solutions to this imaginary problem are easy and obvious to any engineer, they automatically follow from basic UX requirements and they do not require you to have faster blocks.
The basic premise of the faster blocks change is that people hope it will make the price go up. As CashDragon here says “we need this to compete” and Jeremy said basically the same thing in another thread here on BCHR. Talk on Twitter and Telegram as much as you want in order to influence the price, but this forum is the wrong place for that.
It would need a bunch of blocks. So your base assumption is false, “a confirmation” is not what is targeted, instead a certain amount of (proof of) work is.