disposable brake rotors?

[x Baldwin Motion]

I just came from getting my 04 silverado the required annual (NY) state safety inspection. The service manager is a friend that I used to work with over 25 years ago. When he told me I needed rear pads and NEW rotors I was surprised. He said that "nobody" cuts rotors anymore because they are so cheap to replace! I've only got 36,000 miles on this vehicle and wouldn't think I needed pads or even cutting rotors. Is this common with the 4wheel disc brake vehicle? This is a 4WD w/ABS. The past 4 or 5 vehicles I've owned weren't kept long enough to need brakes. (50-60,000 miles) Anyone have anything on this? thanks.