> Tesla's wait times are because every part that sits on a shelf for warranty/service/accident repairs is a part that can't go on a vehicle coming off the assembly line, and we all know that Tesla / Elon has a raging hard on for "deliveries, deliveries, deliveries".

The Soviet Union's automotive industry operated in this exact manner. It's why, when by some miracle you got your hands on a car, sourcing replacement parts was nigh-impossible.

> ... how much more time do they get to realize they should have a parts network?

It took them ~60 years, give or take.