Since the total volume of funds before and after the regulatory reform has not changed, it is possible to claim that such costs will return to their previous levels at some point, as long as arbitrage functions and U.S. dollars can be supplied through other channels. Indeed, some new suppliers of U.S. dollars have started to emerge.
However, it seems that it would take a considerable amount of time for both market participants supplying and funding U.S. dollars to adapt to the new environment and change their behavior.