At every milestone in life, our needs might undergo drastic shifts. In order to optimise your resources, it is necessary to evaluate your property portfolio at these turns. For example, your children have grown up and are now living independently, such that your home is now too large for just your spouse and yourself. Downgrading to a smaller unit with additional cash proceeds might be a practical consideration.
Otherwise, this might come in handy to salvage investment properties that have taken a wrong turn.