I tried tracking D1 with the 2021’s, but just didn’t get enough data to see a pattern. But we could try it if enough people chime in.
There’s not a lot of rhyme or reason to the way the 2021 deliveries rolled out. Well, there is, but it is a lot more complicated than we can track. Has to do with the missing part du jour more than anything. We will not be privy to that info, and it would be nigh impossible to figure it out ourselves (it would require tracking every option on every order, and finding the pattern).
At the end of the day, we all just want to see some indication of what delivery info we should reasonably expect.