Fragmentation Challenges in Layer-2 Blockchain Networks

According to CoinDesk, the rapid multiplication of layer-2 networks atop Ethereum, initially led by Arbitrum and Optimism, has created a complex landscape. The tracking website L2Beat lists 73 active layer-2 projects, 20 layer-3 projects, 81 upcoming projects, and 12 archived ones. This proliferation has led Alex Gluchowski, CEO of Matter Labs, to identify fragmentation as the next significant challenge for the blockchain space. “Right now the race is to solve the fragmentation,” Gluchowski said in an interview with CoinDesk in New York. Many layer-2 chains face issues with interoperability, prompting the development of solutions like Matter Labs' Elastic Chain, released in June. Competitors such as Polygon and Optimism have also introduced their own interoperability solutions, including Polygon’s AggLayer and Optimism’s Interoperability solution. These efforts aim to integrate different chains within their ecosystems. Gluchowski highlighted that the competition is now between projects offering interoperability solutions, specifically mentioning Optimism’s Superchain and Matter Labs’ Elastic Chain as the only live constellations implementing interoperability. He expressed skepticism about Optimism’s plans, noting the complexity of incorporating zero-knowledge proofs into their systems. The ease with which developers can clone technology and build their own networks has contributed to the surge in layer-2 chains. Developer stacks like OP Stack and Matter Labs ZK stack enable users to create customizable layer-2 blockchains. High-profile chains such as Coinbase’s “Base” and Worldcoin’s “World Chain” have emerged from OP Stack, while Layer-1 Cronos has developed its own layer-2 chain, Cronos zkEVM, based on ZKsync technology. The goal now is to enhance interconnectedness among these chains, creating a seamless user experience. Gluchowski believes that the abundance of layer-2 chains should be viewed as beneficial for specific use cases. “The real question is, do we have L2s that matter? And I think that we will not need too many general-purpose layer-2s, but we do need some application-specific L2s or community-specific L2s,” he said. He suggested that these could be regional, catering to specific cultures, or application-specific, such as gaming chains that do not need to share infrastructure with DeFi or financial applications.