Rust lets you specify your own allocator. You can also swap it deeper down as this article describes. It’s no worse than C or C++. Also unsafe Rust is a thing

Rust lets you specify your own allocator. You can also swap it deeper down as this article describes. It’s no worse than C or C++. Also unsafe Rust is a thing and exists precisely to enable programming at the extremely low level when abstractions tend to leak badly. It’s considered bad form to have it in web apps and other normal code but seeing it in a low level data structure or an allocator would not be unusual. Managed languages and high level languages definitely do have an advantage here.