These things always evolve. You go ahead with the initial plan, and time comes that you find better ways to do things. So naturally, in your quest to become better, you add in these new ideas.

Eventually the initial concept has moved so far past what it was that, while the core motive is there, so much had changed for the better that someone just looking at it for the first time would have difficulty seeing the two things as related.

Thank you for replying to my comment. I do enjoy writing about history. :D