Ethereum is invincible and Polkadot will not be able to replace Ethereum. Ethereum's main strength is its large and well-established ecosystem of developers, users and businesses. This is all thanks to smart contract technology, a technology that is indeed the main characteristic of Ethereum.
yes, I also think that polkadot will not be able to replace ethereum. for now, the closest thing to ethereum is BNB. we know BSC is currently intimidating the crypto world. more people use BSC than ETH nowadays. In addition, I heard some news that tokens that have an ETH platform are even currently developing a platform for their BSC as well.