Microsoft's Audacious Plan to Eliminate C/C++ by 2030

Microsoft’s Audacious Plan to Eliminate C/C++ by 2030

A senior Microsoft engineer has announced an ambitious goal that could reshape the future of Windows and Azure development

In a move that signals a dramatic shift in software engineering strategy, Microsoft Distinguished Engineer Galen Hunt has publicly declared an extraordinary objective: eliminate all C and C++ code from Microsoft’s codebase by 2030.

The announcement, made via LinkedIn, has sent ripples through the software development community and raised questions about the feasibility of rewriting hundreds of millions of lines of legacy code.

The Most Windows-Friendly Linux Distributions for General Consumers: A Complete Guide

The Vision: AI-Powered Code Transformation

Hunt’s plan relies on a combination of artificial intelligence and algorithmic approaches to systematically rewrite existing C and C++ codebases into Rust, a memory-safe systems programming language. The goal is to achieve what Hunt describes as “1 engineer, 1 month, 1 million lines of code” productivity levels—a rate of code transformation that would be necessary to tackle Microsoft’s massive codebase within the proposed timeframe.

The scope of this undertaking cannot be overstated. Microsoft’s core infrastructure includes Windows, Azure cloud services, Office applications, and countless other products built over decades using C and C++. These codebases represent some of the most widely deployed software in the world, running on billions of devices globally.

What is the best alternative to Microsoft Office?

Why Rust? The Security Imperative

Microsoft’s interest in Rust is driven primarily by security concerns. Memory safety vulnerabilities—such as buffer overflows, use-after-free errors, and null pointer dereferences—have plagued C and C++ programs for decades and account for roughly 70% of security vulnerabilities in Microsoft products. Rust’s ownership model and compiler guarantees make entire classes of these vulnerabilities impossible by design.

This isn’t Microsoft’s first foray into Rust adoption. Azure CTO Mark Russinovich has already instructed developers to avoid starting new C/C++ projects, recommending Rust instead.

Windows 11 has begun incorporating Rust code in select kernel components, and the company has been gradually piloting the language across various product teams since 2023.

Why is it difficult for viruses to “infect” Linux OS?

The Challenges Ahead

While Hunt’s vision is bold, the practical challenges are formidable. Microsoft’s codebase includes not just application logic but also intricate system-level code, device drivers, performance-critical components, and decades of accumulated technical decisions. Several significant obstacles stand in the way:

Binary Compatibility: Windows has maintained remarkable backward compatibility for decades. Any migration must preserve the ability to run legacy applications and maintain existing APIs.

Testing and Validation: Automated code translation, even with AI assistance, requires extensive testing to ensure functional equivalence and prevent regressions.

Team Expertise: Rust adoption requires retraining thousands of engineers or hiring new talent familiar with the language’s unique ownership model and borrow checker.

Third-Party Dependencies: Many Microsoft products rely on external libraries and frameworks written in C/C++, which Microsoft cannot directly control or rewrite.

Why servers with Linux OS are much more than Windows server?

A Goal, Not a Guarantee

It’s important to note that Hunt’s announcement represents an engineering goal rather than a binding corporate commitment. While Microsoft leadership has clearly endorsed Rust adoption and memory-safe languages more broadly, completely eliminating C and C++ by 2030 remains an aspirational target.

The more likely outcome is a phased approach where security-critical components receive priority for migration, new development shifts predominantly to Rust, and legacy codebases are gradually modernized over an extended timeline. Complete elimination of C/C++ may take longer than 2030—or may never be fully achieved if certain components prove too costly or risky to migrate.

Germany’s Schleswig-Holstein Achieves 80% Open Source Migration: A Blueprint for Digital Sovereignty

Industry Implications

Microsoft’s Rust initiative reflects a broader industry trend toward memory-safe languages. The White House Office of the National Cyber Director has encouraged software manufacturers to adopt memory-safe languages, and other tech giants including Google, Amazon, and Meta have launched similar efforts.

If successful, even partially, Microsoft’s migration could provide a roadmap for other organizations grappling with legacy codebase security. The tools, techniques, and lessons learned from this massive undertaking would benefit the entire software industry.

Windows Software Alternatives in Linux OS

Conclusion

Microsoft’s goal to eliminate C and C++ by 2030 represents one of the most ambitious software engineering projects ever announced by a major technology company. Whether this timeline proves realistic or not, the initiative signals a fundamental shift in how the industry approaches systems programming and security.

The coming years will reveal whether AI-assisted code migration can truly achieve the productivity levels Hunt envisions, or whether the complexity of legacy systems will require a more gradual, measured approach. Either way, Microsoft’s commitment to Rust marks a pivotal moment in the evolution of software security and the decades-long reign of C and C++ in systems programming.

Microsoft's Audacious Plan to Eliminate C/C++ by 2030