Well I guess BSC will remain better option because the eth gas fee will go high sometimes. The gas fee is getting lower now but we don't know that in the next days it will go high again. The problem is still remain so hopefully in the near future the gas fee of eth will resolve.
It seems to me that the cost of transactions will increase along with the increase in the value of coins and this applies not only to Ethereum. The same situation can be observed on the Tron platform, when the cost of transactions has risen from one Tron to 10 Tron. I am sure that the situation will be the same with regard to BSC. Nevertheless, today it is very profitable to transfer Ethereum using BEP20.