We could as a body specify the triggers that would cause us to cancel the second sitting as an in-person. X states under stay at home orders, more than Y deaths per day, Z hospitalization rate, etc. Something.
IMO we held out way past the point of feasibility on the May in-person convention in part because we had neither established objective criteria for pulling the trigger nor established a clear mechanism to pull the triggers. So it all came across as arbitrary and frantic, and a battle between competing subjective whims. I'd like to not relive that again.
JBH