I think there comes a point of "too much" with how big houses are.
Mines only a 2 bed semi 600-700 square foot and driveway. Easy to keep clean and the 2 bedrooms are still fairly empty just bed, set of draws and my computer desk (built in wardrobe). Will be paid off within 5 years with overpayments (mortgage started last year)
I will move at some point, but I wouldn't want bigger, although I do want detached which usually is 3 bedroom minimum, but I wouldn't go crazy. By the time I want to move this will be paid and I'd have a chunk of cash to put towards the new home from savings. If all goes to plan savings and selling this house would pay off the new house all together depending on house prices at the time or a very short mortgage again.
Although I do get wanting bigger houses for families, still think people go overboard. Those American culdesac houses you see are crazy big would just get anoyying with mostly dead space.
Really dislike the idea of people taking decades long mortgages and living perpetually in debt. The interest hurts my soul