A bit of a conspiracy theory, don't you think?
Maybe. For how long did your "My Tesla" status say your car had been built? Were you given a shipping date and a delivery date? Were others? I don't recall reading here posts about vessel names, arrival dates etc. I've bought other brands on special build from the factory several times, and they always ship immediately the car is built - because they want the money! Tesla can't use a fleet of outdated spec Sigs in Australia. Demos are required to be latest spec, and they might eventually need one loaner per service centre. If any cars were built at all, it would make more sense to retro-fit the new items at the factory than ship a bunch of unneeded new cars to a small market to sit in a paddock somewhere. But I could be wrong of course - I often am.