Also Chainlink isn't in the smart contract space, its in the decentralised oracle space. Polkadot is more of a "blockchain of blockchains" rather than an Ethere

Also Chainlink isn't in the smart contract space, its in the decentralised oracle space. Polkadot is more of a "blockchain of blockchains" rather than an Ethereum competitor. Cardano is a smart contract platform like Ethereum but it is a dead project. Ethereum sees tons of usage while Cardano is just a ghost chain.