I understand where people are getting this from but, come on. Just because a character lives for over 1000 years doesn't make them immortal. That's all just fan speculation. I've heard my fair share of speculation from every series and none of it is ever proven true to any real extent. Cadence may be related to Celestia and Luna, but...people are just jumping to conclusions. These are all just fan theories. I try to steer clear from them as much as possible. When it comes to Celestia and Luna, they're meant to be mysterious characters, so it makes sense that people would be asking this many questions. But as far as I'm concerned, all that's true about this is that Celestia and Luna are over 1000 years old. For all intents and purposes, Cadence is not immortal either. When it comes to this deviation, however, if that were true, you did a great job on this. You do make a good point.