So, I still think the only thing which can actually kill Tesla is not answering the phone.
But... in things which will *hurt* Tesla if they manage to start answering the phone....
(A) I'm beginning to get worried that Tesla is trying to avoid complying with its warranty obligations, express or implied.
I really hate to say this, but here, look at
(1) This lawsuit, which I really hope is a one-off:
Sudden Loss Of Range With 2019.16.x Software
(2) The thread about Tesla removing range, and being unwilling to tell the truth about the reasons:
Sudden Loss Of Range With 2019.16.x Software
Frankly, customers might cut Tesla more slack if Tesla were being honest, but Tesla is obviously not being honest or forthright, so the talk is all lawsuits. So communications would help.
(3) The threads about Tesla trying to avoid warranty repairs on the yellowing screens (despite losing three arbitration cases):
MCU Yellow Border - Fixed!
Update from Tesla service on screen yellowing
There are others; these are sort of the high points.
It might cost a lot to actually comply with warranty obligations, but the customer ill-will being created is serious. Not as bad as the ill-will from not answering the phone.
(B) I'm seeing pretty much nothing but negative reviews of the process of buying used cars from Tesla, with the biggest problems being
(1) Tesla usually not allowing people to inspect the cars before purchase, and people discovering major problems at delivery
(2) Tesla trying to get people to sign before inspecting
(3) Tesla failing to agree to due bill repairs, or returns, or otherwise evading obligations (obligations which mostly wouldn't exist if the inspection happened before purchase agreement)
(4) Tesla failing to actually provide the registration & title paperwork promptly
(I suppose you could consider these communications problems too)
Tesla seems to make very little money or lose money on the used car business *and* it's generating ill-will. Why are they even in the used car business?