I believe that Ethereum should not die abruptly. There is no reason for this. But it may gradually give up its positions - this is quite likely. It will be replaced by more technologically advanced, lightweight and convenient counterparts. It is competition that breeds progress.
at first I didn't believe what you said but now I have to consider that it could happen, why can it happen !!! Until now, ethereum has not improved its performance, which for the majority of those who use Ethereum transactions is very disturbed and very detrimental, namely the gas fee which is too stifling.
many have complained but no significant changes have occurred.
This clearly will make many people look for other alternatives that might be used, especially if it is supported by those who provide facilities as well. like what you said that competitors could provide facilities and provide facilities and technology that is easier and cheaper. nothing is impossible if ethereum doesn't want to update it.