Sadly I can pretty much confirm that. Due to a stuffup at Japan launch I was also going to Australia launch (where I had Sig #10), and HQ implied fairly strongly a bit over month back that I may be disappointed that Elon wouldn't be there personally. FWIW although it was nice to finally see Elon in person in Japan, due to the number of the people there and the very short time he made himself available, the experience was rather underwhelming and honestly wouldn't have been much different if he was holographically projected onto the stage (actually, that may have even been more exciting if done well...)
So, I feel sorry for you guys who may have been hoping for him to make an appearance downunder, but wishing you all a great launch party and now you can focus on what this is really all about - an amazing car and the great experience of meeting other owners and fans.
In the meantime, sending you some Model S love from the autumn streets of Japan.
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