When the incentives are beyond just privacy and actually saving money on transaction fees, pooling will naturally take place.

People maybe won’t want to pay $800 for a single base layer transaction fee, but they will pay $20, if payjoins can pool the transaction fee. Also businesses using the base layer could skip transactions entirely by having their customers pay their suppliers directly. Without a second transaction to charge onto customers. New payment terms will arise from this arrangement. Gone will be 90 day net rip-off payment terms.

When it’s more than about privacy, people will adopt it.

When it’s just about privacy, there’s the “should I, shouldn’t I” debate. And the nervousness about the footprint you’re leaving onchain. Cowards in legal teams will take the least risky option and enforce mass surveillance into their products, because they don’t want to be hit with fines for not following vague ‘regulations’. When it’s about being more profitable, efficient and competitive, legal will have a backseat role. Incentives are important.

And finally, to complete my rant, we don’t need a useless privacy coin to achieve the ‘original point of Bitcoin’ as you put it.