I remember an article not to long ago (like past 2 years or so) talking about how all these retail storefronts in Greenwich Village and SoHo in NY were closing because the rents became insane, and apparently (for a reason I don't fully understand) landlords felt it better to have spaces remain vacant than to lower rents. I know redeveloping commercial buildings into residential is very expensive and difficult, but if…
As I understand it (but I'm not sure how applicable this is to any specific place), landlords can write down a loss set by either the last rent they received or the market rate in the neighborhood. If those losses are offset by gains elsewhere, they can zero their tax bill -- which, for landlords with diversified holdings, may be very large.