Large C++ codebases have the same problems that large codebases have in any language: too many abstractions, inconsistent ways of doing things, layers of legacy. It comes with the job. The difference is that in C/C++, hard-to-read code also means hard-to-guess pointer lifetimes.
If the C++ code I worked on looked like that[1] and was actually C with classes, then I’d be switching to Rust too.
For Google and Microsoft it probably makes sense to rewrite Windows and Android in Rust. They have huge amounts of legacy code and everybody’s attacking them.
It doesn’t follow that anyone else, or the majority has to follow then. But that’s predictably exactly what veteran rustafarians are arguing in many comments in this thread.
[1] Pointers getting passed all over the place, direct indexing into arrays or pointers, C-style casts, static casts.
That (PVOID)(UINT_PTR) with offsetting and then copying is ridiculous.
