20 years ago, Banpo was below Jamsil

Back then, it barely kept up with Gubanpo or Jamsil.
It's strange that it rose so much now by soaking up all sorts of privileges.
When other areas rose by 1-2 billion won,
they had reconstruction projects passed like crazy
and bypassed land transaction permit zones,
so is it right that only they are skyrocketing by 4 billion won each?