What has the square footage and amenities for single family homes done over the same time frame? You aren't comparing apples to apples... https://www.propertyshark.com/Real-Estate-Reports/2016/09/08... Not to mention the average household size (number of people) has been dropping...so the square foot per household member is up drastically...
I would also note that you have to consider mortgage rates. They're on the rise now and I'm not sure if it'll still hold, but last time I looked at it the overall payment is down. In 1987, mortgage rates were about 15%. To put that into perspective, a $100k 30 year fixed rate mortgage would cost you $1,543/mo at 18.45% and only $442/mo at 3.38%. I only hope that rates going up will deflate the real estate prices but…
Changing interest doesn't change how many people are willing to live in a location. Your monthly payment will just go to the bank instead.