But it’s trending down (fairly dramatically) over time.

I couldn’t find stats quickly for Barcelona but in other places the amount of space per person takes up in housing has gone way up. People now simply won’t accept housing conditions that were normal in the past.

If more housing doesn’t get built but each person demands more space faster than the population declines the outcome seems obvious.

Woah, I wish and dream of a city in America with a higher population density than Barcelona!

Someone hasn’t seen what Spanish cities look like outside the casco viejo…

Yes. Because apparently, Europe has to meet the bloated housing demand that is being caused by American and foreign investors so that they can arbitrage and make $$$ by gentrifying the locals...