there are some interesting studies for de-aging. I think it would be a more viral-like approach as well. Never thought about the "waste" products it could produce and, hmm, new rule: you can die not only in character generation but in age-reducing!
For me the biggest impact is actually societal as a much longer lifespan can have some interesting (and unintended) consequences. But that conversation does not belong here, so I leave with this study on reversing aging in mice at least:
https://www.livescience.com/57224-ag...ible-mice.html