Ahhh the young generation with their high sq footage requirements!
My childhood homes were all 4/2.5 2000sf and seemed like plenty of space for 2 adults and 3 kids.
TVs and PCs are also smaller now, making living rooms and study areas less bulky. Those first PCs had 60 lb CRT monitors, external disk drives, external modem, space around everything to ventilate the heat, cords everywhere.