This is one of those situations where ‘read the documentation’ would not be a helpful suggestion! After reading it, the word “opaque” came to mind. 
This component is a meta-component and configures a default set of components for Home Assistant to load. The components that will be loaded can be found here.
I sorta get it (a component that manages a default set of other components) but I don’t understand how it automatically keeps that ‘default set’ of components up to date. For example, it’ll automatically update that default set to 0.89 … even if everything else remains at 0.88? That can’t be right.