Most successful conversions are of older buildings with small floors and many windows.[1] Modern buildings with a central utility core and large floors are not good candidates for conversion. There have been some attempts at long, narrow apartments to maximize access to the outside walls, but the result is a slum.
Tearing down malls to build apartments is more common than converting the big boxy spaces.
[1] https://bipartisanpolicy.org/explainer/vacant-offices-housin...