I'm always late in commenting about this argument, perhaps because I've heard it so many times over the years. As Paul Simkins said, these are models, and we shouldn't get too hung up about what we call them, or how devoted we say we are in following them. At the base of all of them is the idea of solving a problem in the most expeditious way. Sometimes you use a hammer, sometimes a linear accelerator, sometimes ice cream. and sometimes some version of SAM or ADDIE. Good friends have written posts or books about new ways of being agile or proclaim the role of SCRUMing. As has been shown so often in the military and in my professional life "no plan ever survives contact with reality." In other words, you are all right, and it is good to read it again.