It’ll be interesting to see how this looks. The same technology was used in Alien: Romulus to revive a younger Ian Holm’s likeness for Rook, and while it was a cool tech demo, it still felt quite uncanny valley and distracting to watch. Casting another actor might have been a better choice. At least for this project the tech sounds more relevant, in that they’re deaging and aging characters within the same film.
The way I implemented this strategy was to make sure I had a single cigarette and lighter on me at all times. I named the cigarette, which psychologically helped prevent me from smoking it. I stuck that out for a few months until a friend smoked it in desperation. At that point I felt confident I’d quit because I wanted to, not because of random circumstance.