“What difference does it make!!”
The negotiations are a bogus attempt to appear to be doing something. Every sane person in the world knows that Iran is going to proceed however they want.
The end result is that the Iranian efforts will continue to be thwarted by sabotage of key elements
It makes a difference because the Sultan is trying to speed up the project. He released the impounded Iranian funds by lifting sanctions to compensate for the damage caused by the oil price drop and will do whatever he can get away with to get Iran a usable nuclear capability as soon as possible, perhaps even to facilitate the transfer of warheads from NKorea or China.