So in general, once you have one abstraction you can start leveraging it into building other attractions and the vector manages a lot of the things that any array based implementation would need. So rather than using a raw array, there’s very little reason to kind of, you know, ditch vector and go the straight raw array in this case because all it basically does it open up opportunities for error and kind of management and the kind of efficiency you can gain back by removing vectors intermediate stuff is really not very profound so not worth, probably, taking on. What we do is consider the only link limitation. We had talked about a link list for a vector and we kind of discarded it as likely not to lead anywhere interesting. ...

See the whole transcript at Programming Abstractions - Lecture 20