I don't remember that last sentence - is it new? Do you think they're listening?"Q: How long does it take a Sim to age?
A: Currently, it takes approximately 41 action-days (as in total days of action time) for the full Life Cycle from start to end. However this may be adjusted in future according to feedback from our players."
My senior sims are living in the spooky house and are doing nothing. If they don't do tasks, they won't age and so won't die. Eventually I'll have a town of seniors doing nothing, and I'll stop playing. (I think this is a stupid update that is poorly implemented and I hope they change it.)