This is strictly related to Apartments. Not Private House or FC plots.
Please make clear distinctions when talking about Housing here & in other threads! Housing basically generalizes apartments & FC rooms into the category, so if you mean to discuss medium house plots for example, don't generalize it into just "housing" be specific please!
Why? SE might consider apartments/ FC rooms to be sufficient enough housing, but it is NOT.
The truth is: Apartments are not adequate housing when Private house & FC house plots offer more features such as: Outside decorations, Gardens, tenants & roommates. They also offer larger item spaces & easier to decorate due to bottom floors being accessible for house glitching.
Apartments (and Fc rooms) Offer only limited item space & storage. In Apartments & FC rooms, currently you cannot have a tenant or 'room mate' who shares the same space as you, which is a feature that only private house/ FC plots allow. Apartments & FC rooms are limited in how you can decorate them as well as the amount of items you can store & place.
Why is sharing an apartment/ FC room with another player important? It saves on gil, space & they can help decorate/ add items. (I'm 100% certain there are other reasons, these are just mine)
Improve Apartments by increasing their sizes. Add extra rooms (similar to the FC workshop) but it's an outside balcony plot that can be decorated with outside decor & a garden.
Improve Apartments & FC room item space AND storage- give them floor layouts- an apartment with the interior of a small(cottage) private house (200 item with a basement)
but it can be upgraded in item space/ floors with extra gil to medium & large sizes.
The only reason I even wanted a private house is because of the cute yard & the house offered MORE item space than an Apartment.
If I've missed anything, please leave feedback below!