The relevant metric here is not how much code you can write or quickly you can write it, but how difficult and impactful the code being written is. Many widely

The relevant metric here is not how much code you can write or quickly you can write it, but how difficult and impactful the code being written is. Many widely-used and industry-shaping pieces of software were (at least initially) the product of just a single programmer, or at most a small handful of core developers. When other people joined it, it is often after the software had some initial success.