alt Hacker News> 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?
Is this a trick question? The answer is 'yes' to all three.
For mainframes, it is.
For AWS, it isn't. Outside of a few narrow exceptions, there is no vendor lock-in into a single vendor. (A container that can run into Lambda can run into Google Cloud Run just fine).
There is no capex with AWS.
There's a free tier and it's freely accessible to anyone. Anyone, and I mean anyone, can start learning it if they want to.
Good luck getting access to a mainframe to play around to see how and what works. Or finding any useful tutorials from this century.