I have 90k miles on my current set of rotors & pads, and the pads have plenty of thickness left.
Even when I did 3-4 track days a year, my pads & rotors lasted like 40k (this was an E36 325i).
"When you were born, you cried and the world rejoiced. Live your life so that when you die, the world cries and you rejoice." - Cherokee Expression