I spoke to a South Korean about this situation.
He shared with me that in South Korea, residential properties in Seoul and Incheon are mostly freehold. However, it is a headache. Because it is freehold, people don't feel the urgency to "revitalize" the properties for various reasons. Then it reaches a stage that the cost of rebuilding becomes higher than the price of the freehold land because the property is very old. Then it is left to rot.
Therefore, in their context, he shared with me that their property market is also like a ticking timebomb.