There is a consensus of "Dynamic Availability" behind Ethereum's ability to refuel in flight. One thing to say is that the least well-known record of the Ethereum public chain is that its block production has never stopped since its inception, and the network resilience is very strong. Following this article, organize the technical logic hidden behind it: 1) The design of the LMD-GHOST protocol is revealing a fatal weakness: in large-scale validator scenarios, its fork selection mechanism will be caught in a dilemma. To maintain network activity, one must either accept lower security or tolerate slower finality. This design is a ticking time bomb in extreme market environments. 2) The newly proposed Goldfish protocol is much smarter. Its core idea is to directly limit the number of validators for each time slot to 256. This seemingly conservative number is actually meant to ensure 'never-ending chain', as it directly bypasses the contradiction trap of LMD-GHOST and uses deterministic small-scale consensus to ensure the continuity of block production. The key is that the design of 256 validators makes switching to the post quantum signature scheme exceptionally smooth, which is also equivalent to paving the way for subsequent Ethereum anti quantum computers. The above technical analysis may be confusing, but Ethereum's steady technological iteration and the vitality that will never wither in the future are the confidence of our holders. What hundreds of thousands of TPS, what zero gas network congestion, what decentralization is all slogans, the ability to maintain uninterrupted operation in extreme situations, and the stable operation of the network are the powerful core barriers of Ethereum consensus, and the key to its worthy "world-class financial infrastructure". ETH E Guard, where are they?