Well, Rebirth isn't exactly a reboot .
And I think the Wally's is a good example of what I'm talking about. Wally II was meant to be the only Wally but now we have both Wally's active in the DCU.
Likewise, we now have all the Batgirls active as Superheroes, with Steph as Spoiler, Cass as Orphan (could find a better name), and Babs as Batgirl.