The land-exit story is real, but it does not always go the way people imagine it will.
Here is what actually happens in the cases that work out. A buyer purchases a surface lot (a ground-level parking area, no structure) in a location where the surrounding land is becoming more valuable, near a transit station or a developing urban corridor, for example. They collect parking revenue while they hold it. At some point, a developer needs that land for a mixed-use building or housing, and they buy it at a price based on what the land can produce as something other than parking. If that future-use land value is higher than what the original buyer paid, the exit works.
The part that catches people is how the original purchase was valued. Many surface lots are priced partly on their parking income, what investors call the income valuation, meaning someone looked at the annual parking revenue, applied a multiplier (called a cap rate), and arrived at a price. If the parking income later softens because of remote work, a new garage nearby, or a venue closing, that income-based price no longer holds up. Whether the land value underneath saves you depends entirely on location.
I have not personally been through a deal, so I cannot give you a first-person account. What I can say is that the strategy guide for this asset type describes exactly this dynamic: the land-banking angle is real, but it concentrates value in specific high-demand spots. A lot in a secondary location may not have the redevelopment demand that makes the land-exit work.
The thing worth confirming before you rely on this exit: what is the land actually zoned for, and is there genuine developer interest in that corridor? A local commercial real estate broker or a land-use attorney can tell you that for a specific market.
What location type are you looking at? That changes the answer significantly.