From what I've read so far by the Illustrious EA Team

, they are having problems with save bloating. However, I think I read here or somewhere else that there is a mod that cleans your saves? Maybe,
laughingdead knows?
Actually, my save file never continues because of that monstrous frequent updates!

My playstyle is different from when I was playing TS3...
There was literally 'Kuree's Save Cleaner' and it was really helpful.
But in case of TS4...... I just save trays of my simfamily -> update -> play new game with that tray file.
And thanks to everyone in this community and creators, I've got plenty of builds to move out.
So, when I decided to update my game, my simfamily usually move out.