Heavy smalltalk-style OOP in C++ has kind of died out, especially with data structures. So with any templated data structure you’re reducing indirection from vt

Heavy smalltalk-style OOP in C++ has kind of died out, especially with data structures. So with any templated data structure you’re reducing indirection from vtables and you have the opportunity to allocate however you want, often in continuous slabs to ease memory transfer and caching.