The January patch of The Sims 4 has refreshed residential lots of the base game. Willow Creek and Oasis Springs now have even more personality. Each home feels like the pre-made townies really live there, with decor and objects tailored to their traits and stories. These lots are automatically added to new games, but there is a way to update existing saves. It is worth the time, as it will give you a great reason to visit these Sims.

https://screenrant.com/sims-4-base-game-update-legacy-lots-op-ed/