Why do you think it will never possible? ETH is the big blockchain still now But you know BSC also very strong platform and we know that how much it’s trustworthy in the market. In BSC huge number of users and also many platforms are migrated from ERC, If it will happen continuously BSC definitely will beat ETH. Most likely we will see something like that in the future.
Agreed, if ETH 2.0 still cannot solve the higher fees soon as it will be available then, probably more and more projects with ETH blockchain (Erc20 token projects and etc.) will migrate to BSC or to other better blockchains due to higher tx fees, and it's proven why projects are mainly migrating to BSC.
Besides transaction fees, in my opinion, what makes transactions on the BSC blockchain continue to increase is DeFi. With the BSC network, DeFi is becoming easier and cheaper especially now that DeFi is an alternative for investors who want to get passive income