This is very useful information. I found out about this several years ago. It was a shock for me that modern cryptocurrencies are losing in the technical indicators of transaction processing to such "old service" as Visa and Mastercard.
However, such capacities are not needed today. Cryptocurrencies do not have such widespread use in the world and such a number of users as Visa cards. Therefore, the speeds are quite enough. Take the Yusra Global ecosystem, for example. These guys from Russia have built an entire ecosystem of their own decentralized services using blockchain technologies, which includes a payment service, a marketplace and much more. I personally tried how everything works for them and I will say that I was pleasantly surprised by the quality. Perhaps the future belongs to such services as Yusra.