I was raised in the UK in a small semi-detached 1930s property. Three bedrooms, one of which was a guest room, for a family with two parents and two children, boy and girl.
I now live in the US in a 1850s Brown Stone terrace in a major city, within a historic district. Our house has five floors, including the basement, and six bedrooms, each large enough to hold a king bed plus a seating area.
My son, on visiting my parents' home, age five, ran up the stairs and asked, loudly, "But's where's the rest of the house?" He was absolutely astonished.
Of course, there are major issues with living in the US the moment, which would be a whole other thread, although living in a Democratic state on the east coast, isn't like living in the Deep South. But, when I compare my home with my parents' house, it makes my parents' house seem not fit for purpose.
My UK bedroom was the box room. It was miniature. No space for a desk - I did all my homework on my bed - no storage, the bed crammed against the damp outside wall, directly underneath the drafty window.
The bedrooms were right next to each other, so I would hear every creak from my parents' bedroom activities (grim to listen to as a child) and every conversation throughout the house. Now, our bedroom is on a completely separate floor from my child's room and all rooms have ample, separate storage in the form of walk in wardrobes. In our room, we have a walk-thru fitted wardrobe, a cedar-cabinet lined room for clothes, that then leads to our separate upstairs sitting room.
In the UK, there was one rather damp bathroom, with an inadequate shower that barely trickled. The walls ran with condensation. There is a bathroom or half bath on every floor in my home, all with spa-like facilities and heated underfloors. Sometimes, I read posts on Mumsnet with people saying, "I would hate to have an en suite! Imagine having bathroom smells and noises in the bedroom." That might be the case if you have a tiny en-suite stuffed into the corner of an already too small bedroom, but our en-suite is a whole separate room, far far away from the bed.
When I visit my parent as I guest, I sleep on a roll-out yoga mat underneath the dining room table. Here, we have a whole guest suite with bathroom, mini-kitchette, and sitting room.
Our house is one of the smaller ones in our neighborhood. We are wealthier than my parents were, but I don't know anyone who lives in a house anywhere near as small as theirs.