I believe that ETH will reclaim it's glory back once gas fee issue is solved, there is also a big difference between BSC and ETH that will still make many prefers ETH, that's the fact that BSC is Centralized and ETH isn't.
If the cost of gas decreases, I will return to the ETH network myself. In recent months, a sharp increase in network fees has forced me to convert coins and leave the ETH network.
Imagine I have to pay $ 25 for a $ 50 transfer!
This is incomprehensible to me, and if this network is improved, we can hope that the previous fans will return to this network.
First, the people that understand the situations of the Ethereum network never leave or stop using it so they need to return.
Second, there's no way you'll need to pay $50 as a gas fee to send a $50 transaction if the receiver address is not a smart contract-related address.
Back to the OP question, ETH is better than BSC in spite of the cheap and fast transaction BSC provided because what CZ Binance and his team do is to edit the ETH concept to create BSC don't know if this is an idea of the ETH team business deal with CZ because ETH network ought to be better by now.