I see this argument made a lot, like when DC wiped out their continuity from the last few decades. But some of the value in stories like Star Trek comes from the knowledge that the characters continue on after the show/movie ends.
And they do. It's been stated over and over again for three years now that the makers of the Abramsverse intended the new timeline to coexist with
the old one, not
erase it. The way DC chose to do things has nothing to do with how Bad Robot chose to do things.