I've seen this pendulum swing both ways, often within an organization. Cross functional teams owning code bases allows divergence to specialize and ownership of

I've seen this pendulum swing both ways, often within an organization. Cross functional teams owning code bases allows divergence to specialize and ownership of a release, teams with a single functional focus allows efficiency of work and cross cutting gains. Both have their boatloads of suck, neither is inherently better. Interestingly, trying to mix them to get the benefits of each doesn't seem to invalidate any of their downsides; often it exacerbates them.