Lately I've seen too many posts in this section talking about an Ethereum killer ( Avalanche, Polkadot, Chainlink etc)and I will like to drop some points about this.
There is one thing I like about the whole crypto idea, the power have been given to the public, people are the ones to still decide where to invest their money, the most popular smart contract project is Ethereum and it's the founding father of smart contract too, if another project is going to kill Ethereum all developers that like using ERC20 smart contract will stop supporting Ethereum and even almost all eth lovers will stop buying ETH and move their funds into the new project, well to me it's never going to happen.
Ethereum supporters are over millions in numbers and people who wants Ethereum to get killed are just few in numbers, NEO,Stellar, EOS are old smart contract projects too but never wished Ethereum dead, they co-exists with Ethereum instead, till this day they can't beat Ethereum, the power of Ethereum is from the community and people's support, Long Life to Ethereum
Often times these guys who just wish ETH's death is referring to the price of the token they supported will much higher than ETH. ETH's death is next to impossible since it's there already and almost thousands of ERC20 tokens are using the platform.
But like you said the power is given to the public and the public will do just about anything including the spread of FUD including the wants to kill ETH. Most of them only just want to buy more ETH for less of its price.