Right now the current fees on ERC20 chain is cheap around 12-19 Gwei which is around $0.5-$1.5 so it doesn't make people wouldn't use ETH in ERC20 chain, but maybe in the future when the market in bull season
Ethereum network is big and that ecosystem is big too. When bull run for ETH and ERC20 tokens comes, gas will become higher and sometimes very expensive, unfeasible for small users and small investors.
The problem of gas and transaction fees on Ethereum network is even worse than on Bitcoin network. With Bitcoin, we did not experience it since 2017 and when the network is over loaded, fee is still cheaper than on Ethereum chain.
they will think and implemented TRC20 chain since the fees will be so expensive.
TRC20 chain is good and it has long history too. It is not like 2 years ago and in next bull run, probably in 2024 or 2025, TRC20 will be old enough and has enough testing from market and users.