I was messing around with MetaMask and BSC its really easy and the GAS fees are incredibly low, cost around 18c to execute a smart contract this is around 200x cheaper than Ethereum network, I'm glad the team chose BSC > Ethereum.
In the future, I think bridges between ERC-20 chain and BSC chain will help projects get more attention from investors. If it is not too hard to integrate for Graphene platform, the team can consider it and try to build up an ecosystem for Graphene as decentralized as possible. Rely on a single chain, Binance Smart Chain or ERC-20 chain is not the perfect choice.
With USDT, it begins with OMNI layer on bitcoin network but after many years, Tether USD now is actively used on many chains: ERC-20, TRC-20, EOS, HECO and more.