Yes, it's lack of building. Half of my city and many other cities around my country were built during the communist 70s and 80s... and then we stopped building

Yes, it's lack of building. Half of my city and many other cities around my country were built during the communist 70s and 80s... and then we stopped building and maybe built 5, 6 apartment buildings in the last 30 years. Then urbanization came, centralization, everyone wants to live in a city.. but we're not building more housing. We can look around europe.. how many apartment projects were done in the 70s and 80s, and how many are being built now.... we built whole new neighbourhoods back then, and now we have 4 people sharing a two bedroom apartment.