I get it except everyone says EDDs means nothing. It must mean something. Imagine if Tesla did not provide an EDD? Everyone would freak out about something that is meaningless?
The reality >> if we can't control it then it must be meaningless.
They didnt use to provide an estimated delivery date.
Sure it must mean something, logistics is super complicated. Its obviously being updated by some algorithm, that has "stuff" its checking. As far as planning anything around it, yes its pretty meaningless at least until you get a vin assigned. As shown, it moves around in the appearance of being random, even though we know that those changes mean "something" to Tesla.
Its not clear what they mean to the end customer, though, so for the purposes of planning by end user customers, its pretty meaningless until you get a vin. People have tried to decode it over the years. My guess is, because logistics is hard and it makes no sense to ship / transport things to various states without combining them together, location probably matters more than order date / order number.
Specific options ordered also probably are more important than order date/ number.
Tesla would want to make sure if they were shipping cars to, oh, Oregon, or New York, that they would have whatever transport that is, full (train, etc) if they can.
Anyway, the logistics probably make sense if you could see the back end info from Tesla that people always try to sleuth out. They end up not making much sense to us, though, especially when dates move around and people are trying to plan vacations and such around them.
Thus the "ignore the EDD" posts from people who have been through this before, trying to save people heartache / angst. It never works though (trying to save people heartache / angst).