It really depends who you're having the conversation with. ADDIE isn't perfect, but it enables us to have simple, clear conversations. As designers, we can get hung up on worrying that ADDIE is too suggestive of a linear approach and that the "e"s in the wrong place. We can replace it with other, new, possibly more complex models which are more accurate descriptions of today's processes. But then we risk leaving our stakeholders way behind. Better keep it simple, keep our people with us, while ensuring those actually doing the work, understand the limitations of the model.