It seems the cost of transaction is growing day by day instead of reducing. People are switching to binance smart chain not only because the fee of Ethereum is high but also because the fee sometime reaching more than "high" or become too high, sometime the fee can become 600 gwei and that's crazy compared to BSC where the fee is cheap and rarely reaching that kind of price.
Maybe people will decide to stay in BSC because it also have a fast speed compared to Ethereum and it's already popular and many people used it.