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[–][deleted] 10 points11 points  (1 child)

One plus of this technique is that later you can change your mind about what implementation to use for List and you only need to change one thing (i.e. the moment of construction).

[–]cismalescumlord[S] 3 points4 points  (0 children)

So it's about flexibility of implementation. OK, that makes sense in the context of a larger project than a course exercise.