Maybe this wasn't clear in my earlier comment, but he has been a mechanic for lots of other types of cars, and he stated that the reliability was materially worse than other cars.

Plenty of people have brought cars before Model S was on sale, and never had a problem. That is reliability. In Denmark we have our fair share of Model S. I live is a smaller city and I see at least 5 every day. I haven't heard about a single Model S without issues, which is the same as a mechanic that states he is on first name with every single Tesla owner in the area.

They are behind most other manufactures in production knowledge, and they're using new technology. Of course it'll be near impossible for them to avoid issues altogether.

mechanics generally do not see the all the cars in a given local area time and time again except for regular servicing.