[andersmurphy]

I mean you can easily do 100K TPS on a M1 with sqlite and a dynamic language. With sub 100ms latency.

People don't do it because it's not fashionable (the cool kids are all on AWS with hundreds of containers, hosting thousands micro services, because that's web scale).

[arter45]

Well, transactions in this context are business transactions, which may involve 1 or N remote calls. Imagine checks against no fly lists, fraud detection, flight delay and so on. Speed of light is also another concern. So it’s not as simple as doing 35k TPS on a local SQL database.

But yes, you don’t always need cool technologies.

[andersmurphy]

True, but a lot of those checks will be against a local snapshots of the data.

> But yes, you don’t always need cool technologies.

That's kinda the irony mainframes are incredibly cool piece's of tech, just not fashionable. They have insane consistency guarantee at the instruction level. Hot swapping features etc. Features you'd struggle to replicate with the dumpster fire that is modern microservice based cloud computing.