Key word there being "might." It could also be that the new thing is way better than the old thing. Being traditional does not make something right. After all, slavery has been around for probably tens thousands of years, and only in the past few hundred has the common moral fabric largely agreed that it is a Bad Thing.
Being new doesn't make something right either and they have been less tested. Also, the Lindy effect suggest that ideas that have been around longer will also continue longer.