Not only TRON to be affected by it, all other chains that had been needing USDT for their transactions and I'm just hoping USDT will not disintegrate off those chain entirely but maintain the relationship then add the new chain. Moreover, if they really want a massive usage, then they going to make sure the withdrawal fee would be far more lower than usdttrc20, usdterc20 and even on TON and Solana.
Or better yet, make USDT transfers free. At least, within Tether's own centralized blockchain network. That would make it "competitive" against the rest of the pack. If Tether and Circle decide to remove their stablecoin offerings from other chains, you can bet top-ranked blockchain platforms such as Ethereum and Solana will lose a large portion of TVL on "De-Fi" smart contracts. And TRON would lose big time, since stablecoins are the only reason it's alive. If they're gone, TRX will turn into a "worthless" "meme" coin. Just like Dogecoin.
I hope Tether and Circle rethink their strategy before they decide to make a chain of their own. I understand they want power/control over everything, but I think they'll "win" more by remaining "blockchain-agnostic". We'll see what happens in the long run.