Gavin Wood, the founder of Polkadot, wrote an article that there are some misunderstandings about Polkadot in the decentralized service platform Avalanche (AVAX) community. He said that Polkadot’s design expects that each block can execute 100 parallel lines in parallel. chain. With the improvement of the network and the optimization of the development language, the number will definitely increase after the threshold is lowered. By then, far more than 1,000 validators and far more than 100 slots of parachains will join the Polkadot network. He believes that Avalanche, like Polkadot, allows any number of chains to be “connected” is misleading. Polkadot parachain slots (much like Eth2.0 sharding) mobilize the capacity of the entire network to ensure security. Avalanche may allow more chains to be “connected” (similar to Cosmos), but in general, these connected chains are far less secure than the central chain. In fact, Avalanche is similar to a centralized Cosmos, with overlapping validator groups selected as subnet security. This will lead to a great unevenness in the security of the various chains in the entire system. Like the Cosmos problem, any solution that attempts to design a central area to execute sensitive logic will encounter scalability bottlenecks and degrade part of the chain into “second-class citizens” who cannot be trusted for state transitions. No matter which chain the program is executed on, it has the same level of security guarantee, and this is a scalable system. Therefore, Avalanche is not safe and not scalable.