Currently Tesla Motors offers no battery degradation warranty. Several other EV manufacturers (e.g. Nissan, BMW, GM and KIA) offer some warranty (e.g. 8-year or 160,000 km’s for 70% charging capacity). Those who are against such low value believe, that it is better for customers not to give such a low value guarantee and that Tesla will as a good will gesture replace battery with smaller degradation, even if there is no specific fault in battery (specific fault of course entitles battery replacement according to current Tesla warranty). They may also think that such a low value would be bad for sales and Tesla’s reputation. Those who favor 70% degradation guarantee believe that it is better for customers to have some guarantee, than no guarantee. They may also think, that if it is not written, it does not exist. Would you rather choose guarantee for 8-year or 160,000 km’s for 70% charging capacity or no warranty for charging capacity at all?