alt Hacker NewsCloud is the new mainframe, except worse. It has all the downsides, but does not have the biggest upside.
The grandpa could create (using CICS), a very reliable and performant service that would call other services inside the same transaction. The platform would handle all the complicated stuff, such as maintaining data integrity.
Try to write AWS Lambdas that call each other within the same transaction.
> It has all the downsides
Vendor lock-in from a single vendor? Wildly expensive capex and opex? Impossibility for people to know any of the tech involved without you sending them on a course to learn about it or them already having experience with it?
> Try to write AWS Lambdas that call each other within the same transaction.
Why is that your comparison? Was deploying to the mainframe as simple as throwing a .zip with your code at an API that you could give access to developers?