Reflection for C++26

1. how immense the language has become, and how hard it got to learn and implement

2. how "modernising" C++ gives developers less incentives to convince management to switch to safer languages

While I like C++ and how crazy powerful it is, I also must admit decades of using it that teaching it to new developers has become immensely hard in the last few years, and the "easier" inevitably ends up being the unsafe one (what else can you do when the language itself tells you to refrain from using `new`?).

Tree algorithms that are simple in literature get bloated and slow with shared_ptr.

The only issue with pointers in C++, which C does not have, is that so many things are copied around by default if one is using classes. So the way to deal with tree algorithms is to have a hidden tree with pointers and a class that wraps the tree and deletes all dangerous copy methods, implicit and explicit.

stdlib++ seems to use that approach as well.