Danny is quite the big shot; he previously led The Merge, which directly propelled Ethereum towards PoS (Proof of Stake), and his contributions are undeniable. His return this time is definitely a significant boost to the technological development of Ethereum, especially amidst the current market volatility and fierce competition in Layer 2 scaling. The support from Vitalik and core team member Vivvek Raman also indicates the community's trust and expectations for him.

What is the impact on Ethereum? I see at least three points:

1. Accelerated technological upgrades: Danny's experience can help Ethereum optimize the network more efficiently, particularly in Rollup and sharding technologies, enhancing future scalability.

2. Boost in community confidence: With a big player returning, market sentiment is sure to be uplifted, especially for long-term holders of ETH, which is a positive signal.

3. Response to competitive pressure: Competitors like Solana and Polygon pose significant pressure, and Danny's addition can help Ethereum maintain a technological lead and stabilize its ecological position.

In the short term, the market may not have an immediate reaction, but in the long run, this is definitely a strong tonic for ETH!