There is a necessary abridgement that happens in media like this, wherein a few individuals in lead roles act as a vignette for the entire effort. In particular, on the software team, James and I are highlighted here, and it would be easy to assume we did this whole thing ourselves. Especially given very generous phrasing at times like "Turner rebuilt Magic Pocket in an entirely different programming language".
The full picture is James and I were very fortunate to work with a team of more than a dozen amazing engineers on this project, that lead designs and implementations of key parts of it, and that stayed just as late at the office as we did during crunch time. In particular, the contributions of the SREs didn't make it into the article. And managing more than half a million disks without an incredible SRE team is basically impossible.