Please note, no project is going to be an ethereum killer now or in the future. no single project can undermine the dominance of ethereum in the Dapps network. Solana, Binance Chain, Cardano, Polkadot will only remain alternative options. maybe now those projects look very good and popular, but all that will fade when ethereum 2.0 comes. Just look at today, while ethereum is still having trouble dealing with the Gas fee issue, they still don't waver. then what can those projects do when ethereum has been able to solve the problem?. nothing, so forget about ethereum killer speculation.
That kind of speculation is always going to be there, it is similar to what we see with bitcoin and people thinking the coin in which they are invested has a chance of surpassing it, I think that even if the chances of this were always small if a developer wanted to achieve this their best chance to achieve this was before 2017, now that bitcoin is being supported by institutional investors and even a country it is almost impossible to surpass it, and I think something similar is going to happen when ethereum 2.0 finally comes.