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Discussion on: Why technologies go out of trend?

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Daniil Baturin

Note that simply learning COBOL won't get one any far. Mainframes use a completely different development workflow, for example. Their OSes are also unlike anything found in daily life now, starting from unusual terminology.

People who make lots of money maintaining legacy systems are so valuable precicely because they know how to maintain the whole system.
Not to dissuade anyone from learning that, but it's much more than just learning a new language.