Plus, I mean, the creator can't predict what kind of sims are going to live in their house. You can build for two sims and a baby or a four person family or a single sim but it also comes down to the personality of the sim (if you like to think about that sort of thing) and how long you're going to play with them. I recently found a great house for my family which consists of a married couple and the wife's sister, for example, and there's ample room for children eventually.
Exactly, that is why I state people don’t need to feel like they have to keep my decor. Everyone’s style will be different based on their taste and what they have in-game. I do like the idea of designing a house with a specific interior style in mind, but only if I have a vision for it. Most of the time, decorating is a chore and that is why so many of my WIPs stay WIPs. I think it will be nice to upload shells though and see what people do with it :)