All the time yes, all the technology, no. That's a little detail you missed
![^_^](http://ntsms.megatherion.com/Smileys/default/_.gif)
They'd have to wait a loooong time before discovering at least electricity, at least judging by their technology in the point where the story finished. AND, surprisingly, they did have children until that point => Elves do reproduct, undevoid of fun
![:biggrin:](http://ntsms.megatherion.com/Smileys/default/biggrin.gif)