I recall reading somewhere that the techs can tell how many times the function has been used and beyond a relatively few times they could challenge any associated warranty claim.
It has brought to mind one occasion with my last GTI when, after a service, I was told they had detected that the car had been “driven beyond its normal limits” or words to that effect.
As I was the only only person ever to drive it (apart from dealer staff!!!!!), I was quite indignant with them but never demanded further explanation or evidence. Recalling that now, six years later, it makes me wonder once again WTF had been going on.
Anyway……launch control? just don’t do it.