Why does this not inspire confidence in Tesla. Their internal software stack is available to their own developers who can review what is actually there.

Why does it have to be perfectly documented in a public github? Are all other car companies "properly" publically documenting things in github?

Does it inspire more confidence in VW's software stack if they don't share it? Is VW's confidential stack some big competitive advantage? I've used a VW ID electric vehicle. I did not come away that impressed.