Bitcoin maximalists appear to argue that theirs is the One True cryptocurrency, and they argue that based on the claim that blockchain and cryptocurrency technology are so complicated as to make it impractical to have more than one such technology in existence.

Let's assume for the sake of argument that the maximalists are correct that other cryptocurrencies and blockchains like Ethereum are fatally flawed. That's an interesting argument to make about the present condition.

But it tells us nothing about the future.