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.
Honestly ETH really much more powerful than BSC
1.2nd to Btc
2.MyEtherwallet connection that connected to all Tokens
3.People's best of users that BTC compete of it.
BSC actually has pretty strong support. but if you look at the coin capacity, ETH is still stronger than BSC. ETH's clear ecosystem support is still the strongest.
although the popularity of BSC continues to increase, it will not shift ETH.
especially if you understand, BSC is a development of the system and ecosystem that has actually been built by ETH before. not only BSC, many networks such as fusion also use the development of ethereum.