As someone that has read through all 198 pages of this thread and has been waiting 6 months for my delivery, can I just offer some humble words of advice to everyone worrying about their EDDs?
Think of an EDD like a weather forecast months ahead of time. If I told you I knew with certainty what the weather will be like on November 9 of this year, you would correctly be very skeptical and not trust that forecast. You wouldn't plan an outdoor event, book a venue, or anything like that based on my forecast, because you know the actual weather that day will probably look very different than my forecast. If I know your location and seasonal averages for precipitation and temperatures, I can probably come up with a decent guess for the forecast. That's all the EDD is at its best (the very first EDD you get). After your first EDD, all the other EDDs--until you get a VIN (and even not then, sometimes)--should be treated as my November forecast.
If you have an October 2021 order and you have a current EDD of September or later, it will probably pull in closer, do not despair. If you are at the beginning of your EDD window now and don't have a VIN, you will probably be pushed out a little later. Most orders (Long Range) still seem to fit in a 6-9 month window, but it is getting longer with each passing month due to chip shortages.
TL;DR Your daily reminder that EDDs are not to be taken seriously. I still check mine every day, like many of you, but I know that the date will move forward and backward several times in the days and weeks ahead and I am not concerned if it suddenly leaps three months forward into the fall because I know it can just as easily jump back.