That's good to know. In that case, my concern would lie with the physical saliva samples that 23andMe has retained, since they could be comprehensively sequenced later.
Running -80C freezers is not cheap! I have 3 -80C freezers in my lab, those large chest-freezers, and each uses 22 kWh per day for a total of 66 kWh per day. Apparently the average US household consumes 29 kWh per day, so we use up 2 houses per day.
Our freezers certainly don't hold the 14 million samples 23andMe supposedly has, more like in the low thousands. They'd need the power-usage of a city to keep all those samples OK!
Storing this for an effectively indefinite amount is not uncommon. I used to work at a clinical genetics lab, and some material had to be stored (by law!) for a whopping 120 years.