In 2017 some others project like EOS and NEO claimed to be Ethereum killer, but finally not even close after more than 3 year. Currently the ecosystem of Ethereum still strong although a lot of project moved to BNB because reason of high gas fee and network congestion. In my opinion BNB is closer to be the Ethereum killer if Ethereum do not solve the problem of high gas fee as soon as possible. Although BNB more centralized but the fact is all user did not want to pay high fee of transaction.