LBC spoke to a negotiator yesterday - I only heard a bit but it was really interesting about how to go about it. He agreed that 21 hours was either 20 hours too long (nothing to be even started) or a few weeks? (Not totally sure but it was well more than a day) too short for the first round of talks - seeing as many deals of this magnitude take years to finalise and are done over several lengthy meetings usually.
The negotiator said he would see a starting point as perhaps the US lifting all restrictions and Iran opening the strait - both things they could pull back on at any point so not trying to tie one in to irreversible actions at this point. And then meet again in a month or two.
So if this is how these things go, who was and who was not serious about this?