Almost none and it’s not (Only) because of the construction method. Today buildings are cheap which means that there is no incentive to keep them around until

Almost none and it’s not (Only) because of the construction method. Today buildings are cheap which means that there is no incentive to keep them around until they become historically significant. That 1000 year old abbey on a hill somewhere likely used to be the only masonry building for 100s of miles for a good chunk of its history and by the time masonry buildings became cheap enough to be mass produced to be considered a commodity it has gained sufficient historical value to be preserved for it. It’s also interesting to think about historic property laws. Land ownership is relatively a new concept and in many places you still cannot wholly own the land. In the past you often couldn’t tear down a building and build a new one as you would lose well essentially your squatting rights. Today however land is just as much of a commodity as ahytbing else which adds another factor that can against the value of the building.