Naturally there are several ideological questions between that approach from the anti GC crowd, and adopting Rust instead.
Not that breaks the C++ vs Rust from your comment, though.
Folks that wonder pre-history tech with amazement and lack of understanding of how it used to work in first place.
The Red Black tree, C++ std::map is a classic example. It has these very attractive theoretical properties, but then you try one for real in C++ and oh, why is this so slow and so RAM hungry? Well yeah, those are only real world problems, the big-O numbers don't care about that.
Ironically there are C# implementations that perform better, exactly because they were developed without WG21 working environment, in a compiled managed language.
For all the performance minded talk, the walk doesn't always follow.
Also std::map cannot be improved by existing processes.
It doesn't take much for one memory inefficient dep to drag down the entire app.