As one of the main smart contract programming languages Vyper strengthens Arbitrum's foundational infrastructure, accelerates the adoption of novel applications, and improves developer efficiency in several ways:

Increased Security: Since 2023, Vyper has worked with 3 major auditing companies (ChainSecurity, Statemind, Ottersec) for regular reviews of the codebase and full audits of every new release. The compiler was subject to a security contest and the team is currently working on implementing state-of-the-art compiler verification methods. Vyper's readability, simple syntax, and disabling of security pitfalls (inline assembly, class inheritance, or operator and function overloading) also help to prevent common security vulnerabilities.
Cheaper Audit Costs: Vyper's focus on readability and simplicity makes contracts easier and cheaper to audit, roughly 20% cheaper than an equivalent Solidity contract, based on auditors' feedback.
Gas and Bytecode Size Optimization: Vyper's compiler offers exceptional performance, producing binaries that are consistently 50% smaller than Solidity and much less gas-intensive (https://blog.chain.link/solidity-vs-vyper/, https://github.com/z80dev/gascomps, https://github.com/benber86/vyper_bytecode). This lets developers write longer, more complex contracts than they could in other languages such as Solidity.
Easy Onboarding of New Developers: Vyper's Pythonic syntax makes it easy to onboard new developers to web3, as Python is now the most popular programming language (Stack Overflow Survey 2024, https://survey.stackoverflow.co/2024/). A recent Twitter poll with 164 participants showed that a majority of developers would pick Vyper and Ape over Solidity and Foundry to start a new project (https://x.com/0xKoga/status/1805524364948893756).
Faster, Better Testing Capabilities: Vyper frameworks like Titanoboa and Gaboon use an interpreter to offer considerable speed-ups when testing smart contracts, up to 10 times faster than other frameworks (https://github.com/vyperlang/gaboon/tree/refactor). These tools also include features such as automated fuzzing and integration with other testing tools to make testing much more efficient for developers.
Superior Developer Experience: Vyper comes with composable modules and an extensive set of libraries (https://github.com/pcaversaccio/snekmate) with secure implementations of common smart contract functionalities. Support for Vyper contracts in Jupyter and Collab notebooks through Titanoboa makes it easy to document, collaborate, and iterate on smart contracts. Vyper is also now well supported by popular web3 development tools such as Tenderly or Foundry and major IDEs such as VSCode and IntelliJ.
Blue Chip Projects: Vyper brings innovative and prominent DeFi projects like Curve and Yearn to Arbitrum. Arbitrum is also the only L2 on which Curve's new LlammaLend product, entirely written in Vyper, was deployed.