Do plush mattresses like this wear out faster?

Not this one, it scores a solid 8.0 out of 10 for durability. The deep cushioning rests on 1000 pocketed coils of heavy 13.75-gauge tempered steel, a high count of thick wire that resists sag far better than budget springs, so the support base does not tire early. The CertiPUR-US certified comfort foam is higher-density to hold its shape. Rotating it head to foot every few months evens out wear. Beautyrest backs it with a 10-year warranty.