In the automotive industry, 0.2% is a huge figure for concern.

The comment you linked is in itself factually incorrect. Firstly, when a Tesla battery dies, towing isn't even an option. The vehicle has to be completely lifted from it's spot and placed on a truck as the wheels can't be released on a dead Tesla.

Secondly, it misses the semantics of the claim. It's not about battery failure, it's about how the battery itself discharges over a prolonged period of time as Teslas, even whilst switched off and completely stationary, require a minor amount of power which progressively drains the cells.

After a period of time, the cells are entirely depleted and the structure of the Tesla battery means they can't be recharged and require replacing entirely. It's been acknowledged that it's a fundamental flaw in the Tesla powerpack that has not yet been resolved.