Microsoft Wants to Replace All C and C++ Code With Rust by 2030

Hello HaWkers, one of the biggest tech news has just been confirmed: Microsoft officially announced its intention to migrate all legacy C and C++ code to Rust by 2030. This decision represents one of the largest shifts in software development strategy in the company's history.

Have you ever stopped to think about how many lines of C and C++ code exist in Microsoft products we use daily? Windows, Office, Azure - we're talking about hundreds of millions of lines of code. And now, all of this should be rewritten in Rust. But why?

The Memory Safety Problem

The main reason behind this decision is simple: security. Internal Microsoft studies revealed that approximately 70% of all security vulnerabilities in their products are related to memory issues - buffer overflows, use-after-free, null pointer dereferences.

Impressive Numbers

Memory vulnerabilities at Microsoft (2019-2024):

2019: 68% of CVEs related to memory
2020: 70% of CVEs related to memory
2021: 72% of CVEs related to memory
2022: 69% of CVEs related to memory
2023: 71% of CVEs related to memory
2024: 67% of CVEs related to memory

Estimated fix costs:

Bug in production: $10,000 - $1,000,000
Bug discovered in development: $100 - $1,000
Bug prevented by safe language: $0

💡 Context: Microsoft spends billions of dollars per year fixing vulnerabilities that could be prevented with a memory-safe language like Rust.

Why Rust and Not Another Language

The choice of Rust was not random. Microsoft evaluated several alternatives before making this decision.

Evaluated Languages Comparison

Language	Performance	Memory Safety	C Compatibility	Maturity
Rust	Excellent	Native	Great	High
Go	Good	With GC	Limited	High
Zig	Excellent	Partial	Great	Medium
Swift	Good	With ARC	Limited	High
Carbon	Promising	Native	Excellent	Low

Rust stood out for offering:

1. Performance equivalent to C/C++:

Zero-cost abstractions
No garbage collector
Full memory control

2. Safety guaranteed at compile time:

Ownership system
Borrow checker
Lifetime annotations

3. Interoperability with existing code:

Native FFI with C
Incremental migration possible
Mature tooling

How the Migration Will Work

Microsoft developed a five-year plan to carry out this transition:

Phase 1: 2025 - Preparation

Planned actions:

Training 15,000 developers in Rust
Creating C++ to Rust transpilation tools
Establishing internal Rust standards
Auditing priority legacy code

Phase 2: 2026-2027 - Critical Components

Focus:

Windows kernel (security components)
Device drivers
Azure network services
Media parsers and decoders

Phase 3: 2028-2029 - Mass Migration

Scope:

Office Suite native components
Windows Shell and Explorer
Development tools
Internal cloud services

Phase 4: 2030 - Completion

Goals:

Deprecation of C/C++ for new projects
Minimal maintenance of legacy code
95%+ of critical code in Rust

Impact for Developers

If you work in software development, this news has direct implications for your career.

In-Demand Skills

Average salaries for Rust developers (USA 2025):

Junior Rust Developer: $95,000 - $120,000
Mid-level Rust Developer: $130,000 - $170,000
Senior Rust Developer: $180,000 - $250,000
Rust Systems Engineer: $200,000 - $300,000

🔥 Opportunity: Demand for Rust developers is expected to grow 300% by 2027, according to industry analysts.

How to Start with Rust

If you want to prepare for this new reality, here are the recommended steps:

1. Fundamentals:

Install Rust via rustup
Complete the official "The Rust Book"
Practice with Rustlings exercises

2. Practical Projects:

Recreate CLI tools you use
Contribute to open source Rust projects
Develop a simple library

3. Specialization:

Systems programming (if coming from C/C++)
WebAssembly (if coming from JavaScript)
Backend services (if coming from Go/Java)

Community Reactions

The news generated intense debates in the developer community:

Arguments in Favor

Developers support it because:

Fewer security vulnerabilities
More robust and reliable code
Better development experience with cargo
Welcoming community and excellent documentation

Arguments Against

Criticisms raised:

Steep learning curve
Longer compilation time
Ecosystem still smaller than C/C++
Migration cost is enormous

Other Companies Following the Same Path

Microsoft is not alone in this trend:

Companies adopting Rust in critical systems:

Google: Android kernel, Chrome components
Amazon: Firecracker, Bottlerocket
Meta: Backend services
Cloudflare: Workers runtime
Discord: Messaging services
Dropbox: Sync engine

Governments and regulators:

White House recommended memory-safe languages in 2024
CISA included Rust in security guidelines
NSA published guide favoring safe languages

The Future of C and C++

Does this mean C and C++ will die? Not necessarily.

Where C/C++ will remain relevant:

Embedded systems with extremely limited resources
Legacy codebases that don't justify migration
Domains where Rust doesn't have mature libraries yet
Academic and educational projects

Where Rust should dominate:

New systems projects
Security-critical software
Cloud infrastructure
Modern operating systems

Conclusion

Microsoft's decision to migrate to Rust represents a paradigmatic shift in the software industry. For the first time, one of the world's largest technology companies is prioritizing memory safety structurally, not just through tools and processes.

For developers, the message is clear: Rust is no longer a "niche" or "experimental" language. It's a skill that will be increasingly valued in the job market.

If you want to understand more about systems programming and security, I recommend checking out another article: Edge Functions and the Future of Serverless where we explore how modern architectures are changing development.