I live in an eastern German city with a university with ca. 24.000 students. The prices have doubled within 10y and weren't affordable for any two incomes below the 95th quantile. The prices in _every_ major city have increased dramatically.

The only affordable houses are run down, old ones, half an hour away from public transportation -- barely anybody wants to live there, because of high rate of right wings (eastern Germany), or lack of infrastructure (e.g. medical care). These broken minor towns and cities might decrease the average prices -- failure of the averages!

Regarding prices, from my POV the article is made-up nonsense.