Polkadot offers better scalability than the ethereum blockchain. It offers relay chain, cross-blockchain features, forkless network, decentralized governance and all these are not available in the ethereum network. Actually, Polkadot offers all the solutions to those problems that the ethereum network can not. So many projects are using the Polkadot network. Do you think Polkadot is really Ethreum killer?
Polkadot is still very young, and we know this project is only running this year,
if Polkadot is able to kill Ethereum, then Ethereum really needs to be serious about launching Ethereum 2.0 as quickly as possible,
scalability should be the main goal.