I'm not convinced. Hard-to-understand code can be hard to maintain as the codebase grows and evolves. It also becomes hell when there's a bug in code that uses that library, and you have to dig through incomprehensible stack traces.
I was grown as a developer when all the 3rd-party code was closed and all you had to dig into was a disassembly.
Well, ok, I do agree to some extent that code readability somewhat matters, plus wide-used code is usually well-written, but turning back to Wordpress example, I’d prefer it to be a WP rather than something having 102% code coverage, 107% test coverage, but not proven in battles.
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