Why are many of the apartments in Annemarie's neighborhood empty?

Many of the apartments in Annemarie's neighborhood are empty due to a combination of factors, including economic decline, high rental prices, and possibly a lack of maintenance or amenities that deter potential tenants. Additionally, if the neighborhood has experienced demographic shifts or increased crime rates, it may further discourage people from moving in. As a result, these factors contribute to a surplus of vacant units in the area.