Well it is dominated by power bases, each with a different degrees of centralization/decentralization.
Devs, Miners, FullNodes - although you might think of other names.

Is that a centralization? Then I think every crypto, despite the ideological claptrap
is centralized to a degree, must be, and we might as well be thinking in terms of different
levels of centralization/decentralization that might very well be caused by some immutable
constraints.