IMO, I think it's an overrated pronouncement because Im already heard it a couple of years ago, but until now there's no such thing as an Ethereum killer, first, why intended to kill Ethereum it's nonsense because the crypto industry is wide and many fields are not yet fully developed so why focus on killing another Blockchain for what, it's a pathetic because how can you kill a working blockchain that has enjoyed vast support from the crypto communities. the competition might be hot but it doesn't mean that they can easily kill Ethereum without any big reasons.