To expand on Patino's answer, many factors can determine the lifetime of red oak floors. Is the product protected with several coats of a durable finish such as aluminum oxide or ceramic impregnated urethane? More coats will add protection to the floor when properly installed, thus increasing the lifetime. Other factors include traffic levels, humidity and temperature patterns, care and maintenance…and so on. So to answer your question, they may last a lifetime or they may not depending on several factors.