I liked "E2" much more than DS9's "Children of Time", I guess because I prefer the ENT characters. And that they lived on a broken down spaceship the whole time, had a mission the whole time (which they failed at. Oops.)
But I do think Old T'Pol was made too old, considering Vulcan lifespans.
And of course, maybe they were destroyed, maybe they never existed.... or maybe they could still be out there somewhere.