The decay pattern
A large institution commissions a flagship site. Faculties and departments then commission their own, each bespoke, each built by a different supplier, each accurate on the day it launched. Three years later the estate contains several hundred pages, an unknown number of them wrong, and no single team can say which.
The cause is not negligence. It is that the estate was designed as a collection of projects rather than as a system with a content model, a pattern library and a named owner per area.