Acreage in NYC isn't free, but in multistory condos where everyone is using the same acreage seems like that's not a fee that should even move the needle in prices. It's not like there's any acreage available for sale to even get a comp, so does $/acre even get discussed in NYC real estate?
In this regard, acre/$ only makes sense in countryside and suburbia, or maybe in suburbia that pretends to be a city, like much of Houston. It should not apply to cities with their apartment buildings.