Most of your post there is valid. But for the record, if they meet their goal of delivering ~85,000 cars this year and can sustain the previous growth from 25k-

Most of your post there is valid. But for the record, if they meet their goal of delivering ~85,000 cars this year and can sustain the previous growth from 25k->50k->85k, then 2017 would see deliveries of ~100-110k and 2018 would see ~130k-150k, and 2019 ~160k-185k, which puts them very on track. That's assuming continued linear growth of adding 20-30k per year. Musk has said repeatedly he is aiming for 500k by 2020. While I don't doubt that will be missed, it implies we'll see more than linear growth. I understand there will be challenges -- I just have strong faith in their ability to surmount them.