Ok, I started to stumble into prick territory with this comment. Sorry.

When I purchase an object, I purchase it and value it based on its attributes. The notion of real property, which governs things like land and houses, recognizes that property is unique and no easily replaceable (e.g. it isn't a car where I can get an identical replacement). So when I purchase a house or other property, the value of the property is determined by a variety of attributes. The size of the house, the quality of construction, if there are views, the neighborhood, easements (like a view easement) or a utility easement which would be a negative, and how the property is zone. Changing the zoning on my property changes the attributes of something I own that can't be replaced. So, from that perspective, what you are advocating does strip away someone's property rights (in the case of real property but not chattels).

How do you define transit hub? If you are talking about property adjacent to say a BART station, then that is different than what we previously discussed which was allowing for the replacement of every single house in SFW by a 6 story apartment building (I'm using an extreme case to make a point - bear with me).

In cases where property is next to a BART and is rezoned, then that is a more limited scenario. If the person can get more money by selling and they want to then I could see that being Ok. But what if they get less money for the house post rezoning. Who should compensate them for that loss? Or, what about the house next to their house. I think these are solvable problems because some things are easier to handle at smaller scale.

The eminent-domaining of the Western Addition and Fillmore against homeowners and tenant's wills has absolutely nothing to do with a proposal that would allow property owners without tenants to voluntarily replace the building on their land.

I do view it as similar. The government has altered my property in some way that I may not like and did so against my will. Changing how my house is zones is not different that putting a street through my backyard. A property is more than just dirt and construction materials, this is why there is a special area of the law dedicated to what is referred to as "real property"