Decatur is now the sole delivery center in Metro Atlanta and northern Georgia. The other service centers are transferring incoming inventories to Decatur. If the picture were 3 weeks ago, the parking lot would be full of Model 3's. The design center at Decatur is now closed with the building totally dedicated to Delivery (upstairs) and Service (downstairs) All design activities are now in Avalon (Milton area) and Lenox Square in Atlanta. When I took delivery of my Model X there two years ago and recently visiting the service center, they explained that Decatur is the main center for central Georgia as well as most of South Carolina.
There may be some inventory cars in the picture, but more likely most are customer cars awaiting inspection, prep and delivery.