Team A focuses on making 1 perfect pot. Specifications, research, process, testing, verification, etc. They get pretty close with their initial pots, but they struggle to scale up.
Team B just starts making pots. As fast they can. Make incremental tiny improvements. Most pots are total losses. But they do manage to start making pretty good pots. And they hit scale.
Which approach is better?
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Tesla's QA/QC will not improve, stabilize until their rate of change slows down. They are hellbent on scaling up (20m vehicles, build out charging network, etc) while reducing costs (new tech, fewer parts, etc).
A lot of mistakes will be made.
In the future, I'd consider buying a budget (~$25k?) Tesla vehicle. Maybe after they ship a few million.
Hopefully, we'll have many options to choose from (BYD, Kia, etc).