He's leaving out a big factor that any condo owner understands: maintenance fees. I wouldn't take a unit in that building if it were free, because for the lifetime of the building there will be ongoing excess maintenance associated with every system because of the settling. Imagine the extra wear on the high speed elevators running out of true vertical. Imagine the differential stresses placed on pipes and boilers and tanks that expect to sit vertical. Imagine the effect of continually reseating the building's connections to local services like sewer and electricity. And imagine the effect of the HOA spending money on grand fixes while routine maintenance gets deferred.
In the near term, the effect of the tilt is negligible, but buildings like these continually suffer from imperfect, discontinuous maintenace under the best conditions; the Millenium Tower will forever be marked by every realtor and owner as maintenance-expensive (meaning vastly higher monthly fees) compared to all the other buildings around.