To hopefully put the minds at ease of those who haven't received their update - Tesla evidently is doing this on purpose. They already have a version 4.1 coming out because of all the bugs in 4.0. If you are one of the ones who haven't received 4.0, it is because they are planning to send you 4.1 directly, and are not going to send out 4.0. I was told this from my service rep. He actually seemed disappointed whenI got 4.0, as I think it means now it will be longer until I get 4.1. 4.0 is buggy - I get red warning light every time I get in (low fluid the most common), sun roof control via the thumb wheel is erratic at best. So for those of you without 4.0, try not to despair, b/c it sounds like youll be the first to get 4.1