What Is the Primary Security Benefit of Using a Hybrid Consensus like PoA?

The main benefit is increased resistance to 51% attacks compared to pure PoW or pure PoS. An attacker would need both massive hashing power (PoW) and a majority of the staked coins (PoS) simultaneously.

This dual requirement makes the attack significantly more expensive and difficult to coordinate. It leverages the strengths of both models to secure the network.

The combined cost acts as a formidable barrier.