I'm not so sure. Yes, most believe that Handwavium is magical in some way, but form that to believing in hocus pocus magic is some distance, and many fen are sci-fi fans.
That said, I do believe that the revelation would not be such a big paradign shift, exactly for that reason. They are used to the miracle goop, so moving to full magic is just one more step into the weird, not something truly shocking (Oscar would be one fo the Fen that believed handwavium as magic from the start).
But the one whose beliefs about paradigm shifts matter in this problem is Noah's, becuase he is the one who has the grimoires...
That said, I do believe that the revelation would not be such a big paradign shift, exactly for that reason. They are used to the miracle goop, so moving to full magic is just one more step into the weird, not something truly shocking (Oscar would be one fo the Fen that believed handwavium as magic from the start).
But the one whose beliefs about paradigm shifts matter in this problem is Noah's, becuase he is the one who has the grimoires...