This continuous quarrel about ETH makes me think deeply about it. There are, not sure but I think, over 6000 cryptocurrencies over there and the significant part of them ERC token. This means there is a strong base coming from ETH. However, these projects create a dumping point for the ETH since their ICOs and sales are making with ETH. Is this going to be a strong ground but lower price vicious circle situation? Will there be a chance for ETH to rise beyond its ATH?
I personally don't think any token or coin will replace ETH soon but... There is a strong but here.
Yes, it is difficult to replace the whole system. Hunters, Investors, Managers, and projects use ETH daily. I can not imagine how long it will take to replace it, if this is possible.