Only a small handful of offices have been successfully converted to housing even though there is a clear market demand for such a conversion on both the supply and demand side. The major hindrances cited:
(1) deep floor plans mean lack of natural light
(2) centralized plumbing and other utilities so retrofitting is very expensive
are exactly why offices are literally not fit for human habitation. Offices buildings were designed to help executives monitor and control cube farms at the absolute lowest cost possible. No sane person would want to live there, even taking into account the massive housing shortage. It'd be like living in a former dungeon.