‘Real forever, as far as we understand it. You could choose the size and therefore age of the universe you wanted to remain within, and/or visit as many as you wanted. You could, for example, head on up through older universes and attempt to access technologies perhaps beyond even this one. But just as interesting is the point that because you wouldn’t be tied to one universe, one time stream, you need be involved in no heat death when the time came in your original universe; or no evaporation, or no big crunch, depending.
