Fancy high end service center waiting rooms are simply legacy dealerships putting "lipstick on the pig" The pig being they are still selling gassers that are polluting our cities, still need lots of regular maintenance like oil changes, mufflers, tune ups, engine air filters, frequent brake replacements, transmission repairs etc.
These required services are what pays for the fancy, Ego boosting, showrooms with unhealthy snacks for the unlucky waiters.
Sometimes the services are paid by owner, and other times rolled into the higher prices of those cars, but the owners still end up paying for the marble floors and Kurigs.
Tesla is working towards a future of their cars needing little maintenance service plus inventing cars that will drive themselves in for service appointments. It is not here yet, but is included in their long term plans.
Philosophy is that the best service is no service. In other words, the cars should be able to travel in excess of 1 Million Miles without needing service.
They are making progress in that area, but not there yet. Million Mile motors, drivelines, brakes, LED lighting, etc are already in the works. This is where Tesla is putting their money instead of fancy dealerships. Feel that customers will be better served this way in the long run.
So for today we are in a transition period. Current service centers and delivery centers are in leased buildings that can be transitioned back into other purposes.
Quality is not there yet for Tesla. Still biggest issues seem to be with panel fittment and paint. Both these still have a huge human element causing variations. Most feel that things are getting better with time, but not quite there yet.
Still big problem is that if 100 owners go into a service center and 99 come out happy, it is usually that one unhappy one that rushes to post on these forums. There are also still a few disgruntled people that are "Anti-Tesla". They sometimes make up negative reports or make little issues sound like the end of the world. Still need to sort through these people as well.
No hiding the fact that current service could still be better and that many still would like better telephone access with service to sort out issues.
This is not unique to Tesla. If you go to Corvette, BMW, Audi, Mercedes, Jaguar etc, you will find the same type of service complaints. Maybe just something that is part of our society.