The larger a product is, and the more people involved, the more steps and phases are needed to keep everything running smoothly. A dev shop with fewer people can be more efficient because there's less communication overhead, individuals wear more hats. But it doesn't scale.
It's also an artifact of Agile, SCRUM especially. If you keep a fungible pool of devs who can be redirected on a weekly basis, they don't necessarily have knowledge or expertise in the area of code they're working on, so there needs to be extra investigation time, sync on technical details, and more QA to cover omissions and unwanted interactions from lack of total knowledge. Component ownership is less susceptible to this but you lose some agility as dev fungibility is reduced.
The larger a product is, and the more people involved, the more steps and phases are needed to keep everything running smoothly. A dev shop with fewer people can be more efficient because there's less communication overhead, individuals wear more hats. But it doesn't scale.
It's also an artifact of Agile, SCRUM especially. If you keep a fungible pool of devs who can be redirected on a weekly basis, they don't necessarily have knowledge or expertise in the area of code they're working on, so there needs to be extra investigation time, sync on technical details, and more QA to cover omissions and unwanted interactions from lack of total knowledge. Component ownership is less susceptible to this but you lose some agility as dev fungibility is reduced.