i didn't - at first i didn't even realize that the temp registration in the glovebox was another license plate. but when i got the real plates i pretty much put the front plate on right away.
given that people steal plates to put on stolen cars to use in crimes, it sucks that it's so easy to get the front plate off of a tesla.
Took delivery on 12/04 and plates arrived during first week of Jan via Tesla. I am sure it was the year end crush of sales on the delay since the DMV issued the registration on 12/22.