One of the beautiful things in Overwatch is how they take usually "magical" archetypes and infuse them with sci-fi. A necromancer and an angel as bio-engineers, abjuration wizards and fairies as hard-light architects, and now a techno-vamp. They're usually very good at this stuff
I think a 77 year old trying to achieve immortality via the healing technology in the Overwatch universe is a lot more fascinating than if Doctrine was outright immortal
Helps Overwatch’s healing feel fantastical while still grounded enough that death is still in question