BNB will never be a replacement for ETH, since ethereum has a completely different purpose, creating smart contracts on the platform, which BNB cannot do, Ethereum is paired with all the exchanges I know, it has 2nd capitalization and 2nd place in terms of trading volume, as well as a large the audience.
That's right, this will never be the same and surpass Ethereum my opinion because Ethereum is one of the most popular coins to date despite a very bad price reduction for Ethereum.