Understanding Ethereum Layer 2 Scaling

What is Ethereum Layer 2 (layer2) scaling all about? What are the differences between projects like Optimism, xDai, OMG, and Loopring? We will answer these questions in the following. 1 The Necessity of Scaling Since the launch of the Ethereum network, scaling has been one of the most discussed topics in the Ethereum community. Debates about scaling always emerge after major congestion events on the Ethereum network.