The key problem with adapting offices into apartments is the lack of natural light in office floor plans. You have a glass skyscraper that has a huge floor surface, but no way to deliver light in the middle of the building. So even if converting it, you’re looking at making very big apartments since they need to hug at least one exterior wall to have any light, and then go toward the middle of the floor plan, whilst getting darker and darker. Essentially you’d be buying a 1-window or 2-window apartment with multiple bedrooms, which is hardly desirable. The problem is that we’ve built office spaces quite differently than residential high-rises, making a conversion into (desirable) apartments sometimes untenable.