Much of the news about ancient DNA has been about radical discontinuities: the replacement of people by invaders and so on. But DNA from five skeletons excavated in ancient Sidon, Lebanon, dating to around 1700 BCE, is remarkably like that of current Lebanese. The investigators posit that 90 percent of contemporary Lebanese genes come from ancient Canaanites.
Of course this is just one study, but it supports other evidence that the populations of the Middle East have been quite stable since the spread of farming. This goes against the idea one can get from the Old Testament that the Israelites exterminated the Canaanites, or at least did great slaughter among them.