For example, the size of bedrooms, bathrooms, kitchens, closets, and garages has increased greatly in the last 100 years.
Have you been to the UK recently? :)
I don't know how much of an increase there was from about a century ago, but for the last few decades it's very much been going the other way. But the UK is something of a basket case when it comes to housing; people want to spend all their money on a mortgage.
Tangentially related, not long ago a minister suggested that people could keep a "jerry can" or petrol in their garage and was roundly mocked not only for the fire hazard, but for the casual belief that everyone has a garage.