In any blockchain network, transaction fees play a critical role. Previously, you would need to have ETH in your wallet to receive ETH. This creates significant user burdens and has limited adoptions of wallets and protocol interactions. In order to simplify the process of sending funds and interacting on-chain, these fees should be able to be paid in any ERC-20 tokens, and not just the native token of the corresponding network.
With Account Abstraction, users can use any ERC-20 token as a subsidize for native tokens upon paying for network transaction fees (gas). Additionally, the option to pay gas via native tokens will still remain valid.