I would hope that Tesla is watching this closely. If a rail shipped car was charged, say, to only 50%, and it was impacted by a strike that lasted weeks, those traction packs could be significantly drained by the time they were off-loaded; and it would be difficult to move a drained battery car off the carriers at all. And the life of the pack could be decreased if drained completely. In fact, battery warranties are voided for extended 0% charge.
I would hope that they start using car carrying trucks only right about now, to avoid an extended strike's problems.
The upside would be a couple weeks delay of late-December eastern deliveries, pushing them into Jan. 2023. Those customers would benefit from the IRA tax credit they wouldn't get in December, if that tax credit still applies.