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Discussion on: Is Rust going to Replace Java?

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There are plenty of the first generation of high-level languages still in use to this day, a large number of banks built on COBOL and have no need to change, so the majority of systems built in Java have no need or reason to be rewritten. If Java drops to the same level of usage as COBOL today, there will be an event that would cause a rush of hiring of developers who know the language, just like the Y2K bug had seen COBOL developers being paid top dollar.