Tesla does the bare minimum communications to get your car ready for delivery. They are not big on progress reports, updates, best guesses, is it here yet, and the hundreds of questions customers come up while they are anxiously awaiting delivery. It is kind of like waiting for Christmas, but you are never quite certain when Christmas day is on the calendar. But they do arrive, and then the communications open back up so Tesla can get the information they need to get the paper work done & the car delivered and paid for.
While it can be frustrating for the customer, it is the most efficient for Tesla.