And "forever" often turns into couple of years because of health problems, job opportunities, personal events, and so and so.
The only reason why houses cost as much as they do is historically low mortgage rates https://www.macrotrends.net/2604/30-year-fixed-mortgage-rate... . And if this (mean reverting) trend is to revert any time soon...
I don't know what actually is going to happen. And maybe FED will eventually decide to hyperinflate the crashing credit bubble which would be great for people with big mortgages. But people that live in oblivion thinking that's the safest investment ever, are completely clueless. But maybe they'll be lucky. :)
Meanwhile here I am in my little city with barely more than 100k people spending less than 1/3 of my income per month with the help of a stable government job. I could get more if I wanted simply by working at the largest employer in town. So why move?