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A comment on The code that controls our money. Parent comment

Re:The code that controls our money by mahogany on Wednesday September 08, 2021 @10:19PM (#28465491)
IBM mainframes likely offer a high level of backward compatibility, so these companies can upgrade the hardware and keep the programs more or less untouched.

Also, I wouldn't be surprised if IBM does a lot of the maintenance for you, on the hardware side.

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Re:The code that controls our money by the_only_law on Thursday September 09, 2021 @12:52AM (#28466359)
> IBM mainframes likely offer a high level of backward compatibility

Just to add from what I’ve read. A zmachine purchased within the last several years could run in modified S/360 binaries.

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