Yes, there is a lot of Barkat( Blessing) for few, but a lot of Ghurbat ( Poverty) for all.
The nations who do not keep themselves are replaced. You know better than me.
8:53 Allah never changes a Blessing He has bestowed upon a nation until they first change themselves (13:11). And, verily, Allah it is Who is Hearer, Knower.
13:11 ----. Behold, Allah never changes a nation’s condition unless they change their inner selves, (their own psyche, the way of thinking 8:53). And when nations suffer Allah’s Requital for their actions, there is none that can repel it, nor do they find, besides Him, any defender.
By the way, there is no such thing as eternal land, country or nation.