Why Less Attraction in Mall Shops, Flats by Investors?

Hello Forum Members,

In my observation, people have very less interest in purchasing commercial shops or flats in Plazas compared to what I see for plots or even for files. Any specific reason for this?
What are the cons associated with buying a shop or flat for rental purposes in high-rise buildings/Plazas and what are the important points/factors to keep in mind in such investments?