EOS and Ethereum: Who Is Polkadot's "Predecessor"?

After Polkadot climbed into the top five crypto asset market cap rankings, it has received much broader attention. Its relay chain + parachain architecture design gives it cross-chain interoperability capabilities, expanding its imagination space. More than 120 projects have built ecosystems on Polkadot. Although mainnet has not officially launched yet, Polkadot has already whetted the market's appetite. The "Blockchain 3.0" baton has been passed to Polkadot. Polkadot's ambitious vision inevitably invites external comparisons with EOS and Ethereum.