I would love to see a full apartment system added to inZOI.
Players should be able to build or own an apartment building on a single lot and rent out individual apartments. These apartments could be lived in by Zois controlled by the player or rented out to NPC Zois as tenants. This would allow us to play with multiple families within the same building and create a more lively, realistic environment.
In addition, the apartment building should have shops on the ground floor. Players could choose to rent these shops out to NPCs or run the business themselves if they want.
For realism, the apartment building itself should age over time, just like furniture does. Paint could peel, walls could crack, and the building could slowly wear down. Eventually, players should have the option to demolish the old building and construct a new one, just like in real life.
I truly believe this system would add a huge layer of realism, storytelling, and long-term gameplay, and it would be perfect for players who enjoy realistic life simulation.
I would like to suggest adding a realistic but non-lethal earthquake system to inZOI.
During an earthquake, apartment buildings should take visible damage. Walls could develop cracks, paint could peel, and windows could break, making the building feel worn down and unsafe. The earthquake should weaken and age the apartment, just like long-term structural stress.
No Zoi should die during earthquakes, but the building itself should suffer damage. After the event, players could repair, reinforce, or eventually demolish and rebuild the apartment.
While the earthquake is happening, Zois should panic and feel fear. They could stop what they are doing, react emotionally, and try to protect themselves, adding immersion and realism to the experience.
In The Sims 4, earthquakes exist, but they only cause the screen to shake and do not meaningfully affect gameplay. I hope inZOI can implement earthquakes in a more realistic and immersive way, focusing on environmental damage, emotional reactions, and long-term consequences for buildings.
This system would greatly enhance realism for players who enjoy deeper and more believable life simulation.
Along with the rental system, there could be garbage chutes mounted on stairwells, regular mailboxes on the wall, so you could stack a few of them (as is usually the case in such apartment buildings - there are entire panels of mailboxes, chutes, so people from the 10th floor don’t have to go downstairs ). Developed (from negative to positive) neighbor interactions. That would be such a combination of City Living + For Rent. Besides that, I would add with such an update additionally some neighborhood of a European city with downtown and suburbs, with a moderate climate where all 4 seasons occur and the playability of this game would skyrocket - you have a ready recipe for increased sales Of course, you would need to write code for a new type of lot, which would be divided into separate, independent apartments, but I don’t know if our computers could handle it
because I like the add-on for The Sims 4 “For Rent” 
). Developed (from negative to positive) neighbor interactions. That would be such a combination of City Living + For Rent. Besides that, I would add with such an update additionally some neighborhood of a European city with downtown and suburbs, with a moderate climate where all 4 seasons occur and the playability of this game would skyrocket - you have a ready recipe for increased sales 