When the land appreciates enough there is no economic harm. If the land reaches $1 million per acre, a developer might want to build a triplex, townhouses, quad

When the land appreciates enough there is no economic harm. If the land reaches $1 million per acre, a developer might want to build a triplex, townhouses, quadplex, etc. and buy you out bagging the owner a nice profit. However local zoning usually forbids upzoning making this productive activity that can ease the housing shortage literally illegal.