I fear for ETH future, almost all smart contract projects are using the PoS staking algorithm but only ETH PoW stands alone, this makes ETH different and one of a kind smart contract project, I think vitalik buterin will regret is decision after ETH goes PoS.
No need to worry, although currently ETH uses a different algorithm on the network in general, ethereum holds the highest throne in the order of cryptocurrency coins as the best network coin.
As long as Ethereum always wants to develop their projects, I'm sure there are very many similar projects that are not equivalent, because it has often happened even from 3 years ago that people say that if they are ethereum killers, in fact they are just bullshit.