It has been strongly suggested at the time when this problem first raised it's ugly head, that it was likely that a LOT of the original ( Gen1 ) ZS EV's still being driven, with the "Buggy" BMS software affecting their cars unnoticed, and low usage owners are totally unaware of the problem.
The idea was, that ANY of the affected cars, would get picked up at the point of the regular service intervals.
But we are clearly aware now that some of these affected cars, have simply slipped through the dealer network.
There was no blanket recall made of these cars at the time.
Just a service bulletin sent to all dealers advising of the condition and action applied should a customer present with issues of range loss & reduced power levels at a lower level of remaining range.
Low usage owners where therefore less likely to recognise the symptoms early on, until the cars started displaying some strange behaviour caused by the "Buggy" BMS update.