What time frame are we talking about, though? 5 years, 10 years gone and then they reappear?

I personally do not believe in "timelessness". From experience... I once went to see an old fave that I had such vividly great memories of, only to find that she really hasn't aged well at all. In hindsight, I should've not seen her again because all it did was ruin my beautiful memories of her.