Due to the limits of public transportation, there are basically three ways out of this situation:
1. Rent ever-smaller, modernized apartments 2. Move away from the center 3. Get out of the city altogether
Modern urbanites will not pick any of these options. They want cheap, large apartments with basically no insulation and 4m high ceilings. They do not want to travel more than 10min with the subway. And the thought of leaving Berlin borders on a crime against humanity. Now add to that the part of the population that lives in the center of the city for decades and literally cannot move anymore and you have a really bad situation at hands.
IMO, it is ironic how the modern urban population that is so quick to assign blame for climate change (to car owners, carnivores), social injustice (to white men, preferably older), or simply a lack of mobile network coverage fails to understand their own contribution to the problems of a modern city.
Sorry, but I needed to vent that.
[1] Exaggeration. I don't even know if there are/were any Jews in Afghanistan, but I like good Bagel.