One of the problems with the automaking industry is that there’s a lot of stuff where you buy a very expensive machine and have a very expensive setup for said expensive machine (molds, templates, whatnot) and then the cost for almost everything else (materials, person-hours, etc) is lost in the noise.

Scaling up and down a car assembly line is hard so an automaker really wants to plan this out really really well such that the design is done at exactly the right time for the big switchover, you have a constant staffing level for the line, all of the machines are working roughly at their optimum capacity, and you’ve got enough spare cars so everybody can go to the lot and get a car of their choice fast enough to satisfy whatever impulse caused them to want a new one.

So I guess mayyyyybe possibly they are working to get ahead of the seasonality of car buying but I’m betting that what really happened is that they screwed up their planning, possibly because some chunk of the potential buying population doesn’t want a Tesla anymore.