Perhaps the sciences offer the best analogy here. At one time, Newtonian mechanics was a model that was thought to describe reality. But when Einstein came along, his model was then seen by scientists and common folk as a more accurate model which is more fundamental in a sense than Newton's. Scientists don't want to say that Newton was wrong maybe because his model still has practical applications in society. But say, one day, a model of physics will render both Newton and Einstein's theory useless (as an explanatory or any other kinds of tool such as a handmaiden for developing new technologies, say) and posit laws and objects that are so different from anything these two physicists posited that people may forget those other theories and call them false.
Here, you can say that it is because the new theory more accurately represents reality than the former two or you can say that it has more usages that the previous theories it has supplanted does not. What reasons do we have for the former explanation than the later?