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Rust will eventually replace C++: it's useful in areas where performance matters and things cannot be dumbed down without much consequence.

For a CRUD app server, its an overkill, though.

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It may replace C++, but it will take decades to do so. The C and C++ ecosystem is gigantic and has been around for 30 to 40 years and will will be around for the next 100 years or more years IMHO.

Replace = new development is done in Rust, C++ development is for supporting (huge amounts of) existing C++ code.

Even COBOL is not completely phased out by now, and runs in production, but it has been largely replaced by other languages.

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