Break is really the wrong word for it. Strong networks by definition simply can't be broken. But, a network can be dwarfed or subsumed no matter how strong it

Break is really the wrong word for it. Strong networks by definition simply can't be broken. But, a network can be dwarfed or subsumed no matter how strong it is, and a network may weaken over time if the facilities that bind it together are made obsolete. A weakened network may disintegrate suddenly. One example: Everquest. Its network-effect was dwarfed by World of Warcraft, and the gameplay didn't keep pace which led to a gradual weakening.