FTA, "...Over the years, as the investment required to continue scaling the centralized repository grew, Google leadership occasionally considered whether it wo

FTA, "...Over the years, as the investment required to continue scaling the centralized repository grew, Google leadership occasionally considered whether it would make sense to move from the monolithic model. Despite the effort required, Google repeatedly chose to stick with the central repository due to its advantages..." The article goes into detail about both benefits and drawbacks. The manyrepo approach also has advantages. Care to elaborate on any of these? (aside from the obvious "works fast on my machine")