It is interesting, my airline asks us to use max reverse every landing when no noise abatement is in force, and use minimum brakes. At our base airfield which has a very long runway, means I rarely ever touch the brakes above 70kts or so when I bring the reverse back to idle.
I personally don't worry about the economics of brakes vs. reverse, I do what the company want when performance and airmanship permits. Our aircraft are leased, so perhaps this means engine wear isn't considered as much? Who knows, I like it, I get to make lots of noise
We have very new 320s, carbon brakes.
Tom.