The primary challenge with office tower conversions are the floor plates. Most are big, sprawling rectangles with yawning amounts of interior space intended for cubicles, interior offices/conference rooms, and other windowless uses. Natural light is only available at the perimeter and therefore comes at a premium. The vast majority of proposed apartment conversions call for putting the living area along the curtain wall of windows and push the bedrooms into windowless areas within the core, which is problematic. Removing natural light from sleeping areas messes with circadian rhythm, reduces egress options, and reduces ventilation options as well. In my humble opinion we should not normalize the idea that access to natural light and ventilation in a bedroom should come at a premium in residential construction at least. If you’ve ever been on a cruise ship and seen/stayed in an interior state room, it’s pretty much that but a place intended for permanent residency.