With "centralized" i really meant standardized. X11 has a standardized API that tells you how to implement window managers. Window managers themselves can be sw

With "centralized" i really meant standardized. X11 has a standardized API that tells you how to implement window managers. Window managers themselves can be swapped, even at runtime without the need for swapping the whole display server or gui toolkit and are as such "decentralized". Similarly there should be a standardized interface to render fonts which every application can/should use and where the actual rendering backend can be swapped (ideally at runtime as well) because a lot of people have a vastly different opinion about how to render fonts (which comes down to taste in the end) but they want all their applications look the same.