Charter Company spent millions gutting the Universal Marion building and bringing it up to early 1980's Class A standards. As such, bringing it up to 2024 standards should be much easier than other older buildings that haven't been updated since they were built or were last done in even older times.
Floor plates are decent size (measures about 150' x 150' on Google maps = 22,500 sf/floor) and shape so apartments, among other uses, should work well there.
Assuming 20%/floor common area, that leaves 18,000 sf inside apartments. Should be good for 15 to 18 +/- units a floor. Not counting the rooftop round and the ground floor, I count 15 floors. So, might get about 225 to 270 units. That's a solid amount of units (does any north core building have more units?) that should justify a decent investment in updating it.