Agreed that a VIN assignment isn't the end of the battle.
I was assigned a VIN in late December. It was and old build from May I believe (MF428). I took the chance with and said let's go. Had several delivery attempts cancelled due to firmware not being updateable. They needed to order parts.
Since they couldn't deliver before the end of the year, they pulled the VIN from my account. That's when my EDD shot out to where it is now. After a week or so of no progress, I told them I was no longer interested in the vehicle.
The car still remains at the dealer in the showroom I believe. Still waiting for parts. A member posted photos of it here a few weeks back.
I hope your car isn't waiting on parts.