Hmm, I think I may have you beat, as mine was delivered in July...
I weigh 240lbs, and I am the primary driver.
Even worse is my passenger seat , as I rarely have passengers (20% of the time) and my wife weighs 130ish...
If I was not having my vehicle replaced, I would definitely be barking about how bad they are holding up.
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Between the weakness of the ventilated seats and the crappy durability of the perforated leather seats, it makes perfect sens why they removed that option.
The truth is many other manufacturers provide effective cooled and ventilated seats that hold up well, ie my Cayenne, my daughter's Kia Sorrento, etc
It's just not a priority for Tesla since they think so "Californian", like most of that state's population (I can say that since I once lived there).