What Is the Risk of Centralization Associated with Using a Limited Number of Private Transaction Relays?
Relying on a small number of private transaction relays can lead to centralization of the block production process. If only a few entities control the private order flow, they gain disproportionate power over transaction ordering and MEV capture.
This undermines the decentralized nature of the blockchain and introduces a single point of failure or censorship risk. It also concentrates the MEV profit among a few actors.