The closure of Zero Network last month has sparked renewed debate about whether Ethereum's sprawling layer-2 ecosystem has become too crowded. According to reports from CoinDesk, the shutdown joined a growing list of struggling rollups and came amid renewed debate about the network's scaling roadmap. However, industry participants argue the opposite perspective, with Ben Fisch, co-founder and CEO of Espresso Systems, stating that the consolidation is happening among general-purpose layer-2s rather than the broader ecosystem. The trend extends beyond Ethereum, with Cardano founder Charles Hoskinson warning of widespread ecosystem failures as TapTools analytics platform recently shut down, citing unsustainable infrastructure costs under current market conditions.
The data supports the consolidation thesis, with Base and Arbitrum accounting for more than 80% of layer-2 DeFi total value locked (TVL), according to DefiLlama data reported by CoinDesk. Smaller chains have struggled to maintain liquidity, with networks including Linea, World Chain, Starknet and Mantle all experiencing declining bridge deposits over the past six months. Linea's deposits fell from ₹8,100 crore ($976 million) in November 2025 to ₹1,700 crore ($367 million) in May 2026, representing a decline of more than 60%. This consolidation mirrors broader market trends, with Cardano's native token ADA falling below $0.20 for the first time in over five years, down approximately 70% over the past year and more than 90% from its all-time high of $3.09 reached in 2021.
Ethereum researcher Luca Zanolini has explained how the network's two-layer consensus model has enabled continuous block production for over 10 years. The network separates block production from finality, allowing transactions to continue during validator failures and network disruptions. Automatic inactivity penalties reduce offline stake until active validators regain enough weight to restore finality, with the protocol only punishing what it can prove through slashing mechanisms. This design became evident in May 2023 when client faults disrupted finality twice within 24 hours, with the first interruption lasting about 25 minutes and the second close to an hour, yet blocks continued to arrive and the network recovered without coordinated restart. The Ethereum Foundation's Protocol Consensus team is now studying ways to separate block production and finality more clearly, with a March research proposal suggesting using sampled committees for faster blocks while a separate process finalizes the chain.
Despite the challenges, the economics of launching rollups have never looked better, with Ethereum's Dencun upgrade in 2024 dramatically reducing data availability costs. As reported by Messari research cited by CoinDesk, data availability costs now represent only a small fraction of operator expenses for many OP Stack chains. However, the key challenge remains generating sustained demand, with Alice Hou, former research analyst at Messari, noting that without enough blockspace demand, user activity or developer traction, there is little reason to continue maintaining an L2. This economic reality is driving current market consolidation, with Hoskinson noting that economic pressures—not technological limitations—are increasingly determining which projects remain viable in the current funding environment.
The industry is witnessing a fundamental shift from general-purpose to application-specific blockchain solutions. According to CoinDesk reports, several blockchain projects are increasingly focusing on payments, stablecoins, tokenized assets and other application-specific markets. Ben Fisch from Espresso Systems emphasized that successful networks need to build differentiated applications rather than competing with each other as general-purpose blockchains. Alice Hou noted that only L2s with solid existing user bases and clear blockchain infrastructure benefits should launch their own networks, with exchanges like Coinbase's Base becoming dominant examples of this approach. This strategic pivot reflects the reality that mid-sized infrastructure and tooling providers are struggling to maintain long-term viability without stronger revenue or funding support.
