Autobrakes make a heavier application earlier in the landing roll than most guy's use of manual brake.

KE being a squared function of velocity means ten knots absorbed at the beginning of the rollout could be ten times as much energy as ten knots at the end of the rollout.

I prefer Auto 1 or 2 until I get the nose on the pavement, then go manual. Exceptions: places like Maui with rain and Vtgt pushing 160 kts.

I was told way back on the 747-400 (when it was one of the few planes that had Carbon brakes) that it is the number of cycles that wears them out. They said Auto would hold a more consistent pressure. They said constant or increasing brake pressure was good, but every reduction is what caused the wear.

As an engineer, this makes sense to me. I wonder if a red-hot carbon brake, being "smothered" by its matching surface, would not burn-off a few millimeters of carbon every time the brake was released, and air---and oxygen---were to flow in.