My wording was probably the problem. Just meant the CAS cheat is rather pointless to do given you can just get the potions of youth with the satisfaction points cheat. Heck you even avoid a loading screen.
That said, if a person
really needs to change a Sim's age, and will lose reward traits, they can technically re-apply any that are lost by knowing the correct name as far as the game engine is concerned, using the traits.equip_trait cheat
I believe TwistedMexi has all of them on his wiki. I'd just rather not see anyone put in that position over a cheat I proposed. It's definitely better to steer people away from that scenario.
I wish we could cheat and change age groups instantly, there is just setage to make a Sim an adult and I guess that is potentially buggy. I need to see what happens when you use it on an elder..