Optimism Mainnet
Optimism requires ETH that has been “bridged” to the Optimism network. You can "bridge" ETH using the official Optimism Bridge.
While Optimism Mainnet offers significant advantages like lower gas fees and faster transactions, some users may still prefer the Ethereum network due to Optimism's growing ecosystem. This includes a limited number of supported dApps and the need to bridge assets like ETH, which can affect adoption and availability.