For sure, in PCI environments this doesn’t work. And in the Series F company we don’t use this approach for that very reason. But there’s tons of companies that don’t have or need external certifications, and it works for that much more common scenario. For the small web (i.e. most of the web), it’s ideal.

The important takeaway isn’t “wow, doing production builds on your PC isn’t secure.” Do it on a dedicated box in production, then. The important takeaway is there’s a mountain of slow things (GitHub workers, docker caching, etc) which slow developer velocity, and we should design systems and processes which remove or eliminate those pains.