This is a pretty big read so I'm only posting a clip of it
...The Gigafactory is a big statement from Musk, and a clear sign that Tesla believes the world is ready for full electrics. But does the world agree? Are lithium-ion batteries the way to go? The total number of cars sold in 2015 was around 72.37 million. Electric vehicles accounted for around 0.8 percent, or 540,000, of that number, a significant step up from about 376,000 EVs sold in 2014, but still less than 1 percent of cars sold worldwide....
https://techcrunch.com/2016/11/06/what-teslas-new-gigafactory-means-for-electric-vehicles/
...The Gigafactory is a big statement from Musk, and a clear sign that Tesla believes the world is ready for full electrics. But does the world agree? Are lithium-ion batteries the way to go? The total number of cars sold in 2015 was around 72.37 million. Electric vehicles accounted for around 0.8 percent, or 540,000, of that number, a significant step up from about 376,000 EVs sold in 2014, but still less than 1 percent of cars sold worldwide....
https://techcrunch.com/2016/11/06/what-teslas-new-gigafactory-means-for-electric-vehicles/