For small dollar transactions it's actually not surprising. Credit card companies usually charge a 2.9% transaction fee. For a business with a profit margin of say 5%, the transaction fee eats up 60% of the profit. Lightning is potentially a cheaper and equally fast and convenient option. Harder for consumers to issue fraudulent chargebacks too (good from a merchant's perspective)

And so the scales of the slow but steady transition will continue, as mere exposure to Bitcoin allows the masses to understand it better and better. When people use Bitcoin as a savings account and even take paychecks in Bitcoin knowing they'll spend their checking account faster than a price move can come, combined with gradual price stabilization as the halvening has less effects on price and therefore does not trigger hype as it did in the past, dollars will be used only to pay taxes and the inflationary effects the dollar will encounter as a result via the velocity of money, will mark a full transition and economic systems that surround us will transition with it as a result of the incentives.