It heavily depends on what do we call “design pattern.” If something that is considered to be cool by a majority, then I have no opinion on the subject since I am not interested in what the majority thinks at all.
If, OTOH, we are talking about something, that is invented and used inside a team of any size (it might be used by one single developer,) then I am interested in and I am positive these design patterns are indeed a result of re-thinking the experience, but they are always brand new concepts.
That is what I tried to summarize in my article :-) (It is not an invention by me, it is a summarization of all the information I got from international design pattern conferences and books on this topic).
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