Earlier quoted context omitted.
We need more precision in the scale and performance targets you’re seeking prior to discussing blockchain analogs. It’s tough to respond when “serious financial application” or “revolutionary technology backing all finance” aren’t well-defined.
Sorry, thought my last paragraph covered that. Can any blockchain-backed tech handle the number of transactions per second that current major credit card/payment networks do? One benchmark is 1,700 tps for VISA. https://phemex.com/blogs/what-is-transactions-per-second-tps If not, why not? Especially after 10+ years of development and intense VC funding (as is the parent article's point).
Ethereum 1.0 can handle 30 transactions per second.
Part of the development dubbed "Ethereum 2.0" is focused on scaling the number of transactions via sharding. Each shard will be able to handle 2,400 tps. As more shards are deployed up to 64, Ethereum 2.0 will reach 160,000 tps.