Well, the final paragraph in the article does state:-
The KDC-10 will play a limited role in refueling the Dutch F-35s, however, as the Netherlands is involved in a multinational tanker program with Poland and Norway to purchase Airbus A330 Multi-Role Tanker-Transports. These will replace the two KDC-10s currently in service.
So the KDC-10s role in this respect will not be long-term.