With a relatively small number of Service Center locations, and with rapidly increasing number of vehicles being sold, we should expect to see periods when some areas have extended times to get into service, until Tesla is able to increase capacity in those areas.
They've announced plans to deploy a fleet of mobile service vans - which should help considerably, able to handle most of the work currently handled by the Service Centers today. Increasing capacity should be much easier - by adding a van and a service technician - rather than trying to expand or add more Service Centers.
If Tesla is able to handle most of the service using mobile vans - that come to you, that should be a game changer...
Until then, may take some patience in areas where the Service Centers are swamped...