During the beginning of all this everyone was freaking out about how we were going to be able to ship and store this magical elixir at -70F. They were adamant about it. People were worried about refrigeration shortages.
I'm sure it cost a significant lot more to ship something then store it at -70F.
What happened that we went from this getting shipped in temperature controlled shipping containers, to sitting on a truck in a cardboard box next to my Amazon order...
I suspect there are any number of experiments being performed and a corresponding number of formulations, by each manufacturer.