Here is the deal..
This only impacts P90Ds. There is a lifetime counter on launches. However, to count as a launch a bunch of crieteria must be met:
1. Launch mode must be on
2. SOC must be >90%
3. Perfect traction must be maintained. Any amount of slip will cause power to be reduced and it won't count.
The limit is 25 for the rear drive unit. If this limit is hit, power is reduced slightly resulting is a difference of 0.05s 0-60.
Basically, unless you regularly take your car to the drag strip and can manage to maintain perfect traction while meeting all or the other conditions above, this is a non-issue.
I encourage everyone not to blow this out of proportion.