Yeah, I can only imagine what a nightmare of zoning regulations and everything else it is on top of the upfront cost, which none of these property owners want to pay.

I can't help but think, though, how much better our cities would be if we replaced all that empty office space with housing. I watched a great video once about how a city in New York has removed half of the aging highway ring in the city and is planning on removing the other half because of how replacing it with local roads has not only opened up tons of new land for development, but also revitalized their dying city core because of how much more accessible it is.