I can tell, Elon doesn't program. Working twice as hard as a computer programmer is a sign of a few things, if not all of them:
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The expression problem: Needing many more lines of code to express the same functionality. More code = more time to write it, slower code, and introduces more bugs.
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You do not have the true skillset to understand the architecture, maintain, or upgrade the codebase. Provided it is a good codebase without repeated logic or code.
Both are not a good signs. I would rather hire someone who works less, writes less code, and builds the same functionality. Easier to maintain, no need to refactor, and runs quicker.