When I had factory built rims, they were going out of true and breaking spokes all the time.

Once I built my own wheels, and later when I bought a hand built wheel, no more problems. I've put 16000 miles on my own wheel (until the axle broke) and a further 6,000 miles on the purchased, hand-built one, and they're both dead true.

I ride 8 miles of gravel road daily so they don't exactly get babied either.