Comment by japanuspus

Seems an overly pessimistic take. TFA specifically mentions per-cell temperature monitoring, and I would assume there is also per-cell voltage monitors.

As long as the controller is made sufficiently conservative, there is no fundamental problem: you limit the current according to the cell that heats the fastest and shut down once one cell is near depletion.

Maybe they have even gone a more aggressive route and build a balancing circuit that can route significant current around a low-capacity cell. Or maybe just charging logic to keep as many cells as possible in the 20-80 regime if they will be limited by low-capacity members anyway. There are so many options here.