Currently, the number of daily transactions on BSC has surpassed that of Ethereum, which is due to the advantage of speed and transaction costs. However after the London update, using Ethereum's layer-2 and EIP-1559, things will be changed. I hope BSC developers also have plans to upgrade BSC with layer-2.
I think this is because the fee from ETH is quite expensive because the price of ETH is very expensive, so the estimated value is quite large, even though it's only 0.00 ETH
It seems that we should already forget that the ethereum network had a difficulty with high transaction fees. For a long time, due to the general fall in prices in the cryptocurrency market and a decrease in the total number of transactions, the gas price in the ethereum network has dropped to several Gwei.
In about a week, the London hard fork will move from test mode to the main network and then, perhaps, low fees on the ethereum network will be the norm.
Binance Smart Chain just copied a lot from ethereum, however due to the significant centralization of BSC, I think. many projects will return to the ethereum platform again.