Most of us here are making investment decisions (some large) that will more than likely be affected by whether or not we see inflation. And by how much inflation we see. And at what point that inflation will affect consumer confidence, if it appears.
I think the IS-LM model is useful in giving a simplified approximation of what we can expect to see given a certain set of parameters.
What this discussion is about (and what the discussions in the links I posted are about, which I assume you will have figured out on your own) is trying to predict what those parameters will be ahead of time.
