Musk was talking about existing packs lasting 400,000 miles and working on new ones that will do 1 million. You can't get those sort of life spans if you use the full cycle - think how long your phone battery lasts.
edit: there are recommendations for Tesla daily use that say go to 90% most of the time. But still a bit different to putting 12% completely out of reach like Audi have done.
As is par for the course, their PR news will come hot and heavy: Cars go further! Our entire business model is now robot taxis! None of it matters if you can't sell your product at a profit.
To be fair to your point, the "Autonomy Day" presentation implied a willingness to renege on the promises about other quarters as well.