This might be a boring business, but it's hard to argue with its long-term performance.AutoZone (AZO 0.67%) might fly under the radar these days, as it's not at the forefront of the artificial intelligence, robotics, or cloud computing trends. But the business deserves some attention. It certainly possesses favorable qualities that shouldn't be overlooked.Are investors in this retail stock happy? Or did they miss out on AutoZone's ascent? AutoZone is a long-term market outperformerThis stock has lagged the ...