API Gateway & API Portal vs CentraSite/Mediator

Hi,
Just a simple question. Has API Gateway & API Portal replaced CentraSite & Mediator ??

API Gateway ‘not just replaces’ Mediator BUT also provides much more rich functionalities which are not available in Mediator.

CentraSite ( an optional component in API Management suite ) still provides its best of breed core design time governance functionalities.