Inside Cardano's 'Van Rossum' hard fork, and what it means for users
Cardano's Van Rossem hard fork activated on July 18, moving the network to protocol version 11 and lowering smart contract execution costs while preparing for a future scalability upgrade.
Intelligence analysis by Llama
Cardano's Van Rossem hard fork is the first upgrade approved without Input Output in charge, marking a shift in who controls protocol changes. The upgrade lowers smart contract costs and lays groundwork for an upcoming scalability overhaul.
Imagine you're building a house, and you want to make some changes to the design. Normally, the person who built the house would tell you what changes you can make, but with Cardano's Van Rossem hard fork, the people who own the house (the users) get to decide what changes to make. This is a big deal because it means that the users have more control over the network and can make changes that benefit them.
Analysis
A Shift in Control: The Van Rossem Hard Fork and Its Implications
The Van Rossem hard fork is a significant development in the history of Cardano, marking the first time the network's community has voted in an upgrade. This shift in control has far-reaching implications for the future of the network. For the first time, Cardano's holders have approved a protocol change without the input of Input Output, the company that designed and built the blockchain. This change in control has been made possible by Cardano's onchain governance system, which allows stakeholders to vote directly on protocol changes.
The Van Rossem hard fork is not just a technical upgrade, but also a procedural one. It lays the groundwork for future upgrades, including the planned Ouroboros Leios scaling upgrade expected in 2026. This upgrade is aimed at sharply increasing transactions per second without weakening the protocol's security guarantees. The hard fork is named for Max van Rossem, a Cardano governance contributor who helped shape the network's constitution and died in October 2025.
The benefits of the Van Rossem hard fork are not immediately visible to users. Transactions work the same way, wallets do not need updating, and the fee to send ADA is unchanged. However, the upgrade does lower the costs of running a smart contract, which will benefit developers and users in the long run. The Plutus changes will allow for cheaper execution of smart contracts, which will enable developers to build more complex and capable applications on the Cardano network.
The Van Rossem hard fork is a significant step forward for Cardano, marking a shift in control from the founding company to the community. This change in control has implications for the future of the network, and it will be interesting to see how it plays out in the coming months and years.
Key points
- The Van Rossem hard fork is the first upgrade approved without Input Output in charge.
- The upgrade lowers smart contract costs and lays groundwork for an upcoming scalability overhaul.
- The hard fork is named for Max van Rossem, a Cardano governance contributor who helped shape the network's constitution and died in October 2025.
- The benefits of the Van Rossem hard fork are not immediately visible to users.
- The upgrade does lower the costs of running a smart contract, which will benefit developers and users in the long run.
The Van Rossem hard fork is a positive development for Cardano, as it marks a shift in control from the founding company to the community. This change in control has implications for the future of the network, and it will be interesting to see how it plays out in the coming months and years. The upgrade also lays the groundwork for future upgrades, including the planned Ouroboros Leios scaling upgrade expected in 2026.
One potential downside of the Van Rossem hard fork is that it may lead to a decrease in the value of ADA, as the shift in control may be seen as a risk by investors. Additionally, the upgrade may also lead to a decrease in the security of the network, as the community may not have the same level of expertise as Input Output.
