Why Rust Can't Replace C++

C++ is just better than Rust.* Check out Macroscope: https://jetty.to/macroscope *at some things. I know I've made a few videos about Rust replacing other languages - simply because I find these sorts of things fascinating, like rewriting an entire codebase. And I typically have a section in those videos stating while Rust is great in many use cases, it isn't a magic bullet. So I figured it was time to make a dedicated video on that notion, specifically surrounding C++, because I've found that most people consider Rust to just be a better C++ all around, more so than any other language. This idea, however, translates to plenty of other languages. Rust is good, but it isn't always the best choice. I hope y'all enjoy!! Sources: DARPA TRACTOR (C to Rust): https://www.darpa.mil/research/progra... CISA Product Security Bad Practices: https://www.cisa.gov/resources-tools/... Secure by Design, memory safety (Google): https://security.googleblog.com/2024/... Why C++ Wins in Finance, Juan Alday (Citadel Securities):    • Juan Alday: Why C++ Wins in Finance   Spread Networks (Wikipedia): https://en.wikipedia.org/wiki/Spread_... How to spend $300M on 3 milliseconds (Jim Campbell): https://jimdcampbell.com/2016/09/01/a... Zig 0.15.1 release notes: https://ziglang.org/download/0.15.1/r... Zig 0.16.0 release notes: https://ziglang.org/download/0.16.0/r... rustc codegen, LLVM backend (Rust Compiler Dev Guide): https://rustc-dev-guide.rust-lang.org... Rust atomics (std docs): https://doc.rust-lang.org/std/sync/at... Too Many Linked Lists: https://rust-unofficial.github.io/too... Rust linked list patch, Alice Ryhl (Rust-for-Linux): https://lkml.rescloud.iu.edu/2404.0/0... allocator_api tracking issue, open since 2016: https://github.com/rust-lang/rust/iss... Hazard pointers, C++26 (P2530): https://www.open-std.org/jtc1/sc22/wg... RCU, C++26 (P2545): https://www.open-std.org/jtc1/sc22/wg... C++26 (cppreference): https://en.cppreference.com/w/cpp/26 CUDA Programming Guide, C/C++ Language Extensions (NVIDIA): https://docs.nvidia.com/cuda/cuda-pro... cuBLAS: https://docs.nvidia.com/cuda/cublas/ cuDNN: https://docs.nvidia.com/deeplearning/... TensorRT: https://docs.nvidia.com/deeplearning/... PyTorch ATen (C++ core): https://github.com/pytorch/pytorch/tr... Rust-CUDA: https://github.com/Rust-GPU/Rust-CUDA cuTile Rust paper (NVIDIA Research): https://arxiv.org/abs/2606.15991 Unity and .NET (Unity blog): https://unity.com/blog/engine-platfor... C++ in Unreal Engine (Epic): https://dev.epicgames.com/documentati... Embark Studios Rust pledge: https://www.embark.dev/ Embark builds ARC Raiders on Unreal (Epic interview): https://www.unrealengine.com/develope... Gameplay at Embark, careers page: https://careers.embark-studios.com/pa... Leaving Rust gamedev (LogLog Games): https://loglog.games/blog/leaving-rus... rust-gpu (started at Embark): https://github.com/Rust-GPU/rust-gpu Safe C++, P3390 (Sean Baxter): https://www.open-std.org/jtc1/sc22/wg... Circle C++ compiler: https://www.circle-lang.org/ Profiles, P3081: https://wg21.link/p3081 Committee picks profiles over Safe C++ (The Register): https://www.theregister.com/2025/09/1... Trip report, profiles targeting C++29 (Herb Sutter): https://herbsutter.com/2026/03/ C++ growth vs Rust, SlashData numbers (Herb Sutter): https://herbsutter.com/2025/12/30/sof... Why Fighter Jets Ban 90% of C++ Features (LaurieWired):    • Why Fighter Jets Ban 90% of C++ Features   A portion of this video was sponsored by Macroscope. Other socials: 🐱‍🚀 GitHub: https://github.com/forrestknight 🐦 Twitter:   / forrestpknight   💼 LinkedIn:   / forrestpknight   📸 Instagram:   / forrestpknight