> What do people do with all this space? Media/theater rooms, library/study/office, formal dining room (probably a complete waste of space 90+% of the time, ad

> What do people do with all this space? Media/theater rooms, library/study/office, formal dining room (probably a complete waste of space 90+% of the time, admittedly—I turned ours into the library/study), dedicated play room so the kids' shit doesn't take over the rest of the house (in smaller houses this may just be a second, less-public den/living-room area, probably mixed with the media room concept). Separate bedroom for each kid plus a spare bedroom if you can manage it—spare room, if present, may double as an office if space doesn't allow a dedicated room for that. Big bathrooms and closets that allow one's morning routine to be conducted entirely outside the bedroom proper (handy if partners don't wake up at the same time, plus makes tidying easier) and feature things like large tubs and big two-person showers. Entertaining spaces/bars, usually separated from the bedrooms as much as possible, probably mixed in with the media room/theater concept if space doesn't allow them to be separate. Exercise rooms. Those last two are often in a finished basement. Workshops. "In-law" suites (basically a 1-bedroom apartment), often in the basement. Usually several, but not all, of these things are present in a (by today's standards) mid-size or larger suburban house. Bigger houses may have all or almost all of them. I've seen wine cellars (climate controlled, not legit caves) and steam/sauna rooms in houses that were large but not zomgwtf large, so those might be present in the middle-upper range of McMansions depending on the preferences of the owners. Real monster houses that go beyond those may have mansionesque crap like ballrooms, elevators, indoor pools, et c., but then you're approaching or exceeding 7 figures even if the house is in the middle of no-where, so that's actually rich people with poor taste (or maybe they really do have large dance parties on the regular? Who knows. And indoor pool—I mean, if I could easily afford that, yeah, of course I'd like it) not middle-class people trying to imitate the rich. Plus, remember, these giant houses usually have 3+ car attached garages (you'll have trouble selling a newly-constructed house with fewer than 2 garage bays in the US 'burbs these days—older houses sometimes have only one, or none, though) and maybe another bay around back if the basement is walk-out. Those make them look bigger than they are, as far as living space goes. Not advocating/defending any of this, just providing an answer to the question :-)