this post was submitted on 20 Dec 2023
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How much power do older mainframes need (if they're actually even run)? (self.technology)
submitted 11 months ago* (last edited 11 months ago) by ShittyBeatlesFCPres to c/technology
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I’ve never worked with major enterprise or government systems where there’s aging mainframes — the type that get parodied for running COBOL. So, I’m completely ignorant, although fascinated. Are they power hogs? Are they wildly cheap to run? Are they even run as they were back in the day?

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[–] [email protected] 1 points 9 months ago

If you ever talk with an insurance guy or system admin, you will understand why as/400 can't be replaced that easily and most of the time people were unhappy with generic stuff replacing it.

Once while the split of IBM was on table, Microsoft was only interested in AS400 line. They used to do a lot of critical things on them. Yes, even Microsoft.

One can emulate AS400 since the entire thing including hardware and OS is a virtual platform from the start. I am not into financial/insurance/travel so I didn't investigate if IBM offers a POWER or Xeon replacement. You won't be able to explain throwing away millions of lines working code to move to some current fashion framework/language. These people make their money from 1/1000s of cents.