“Our analysis suggests a modern lithium-ion battery has approximately 135,000 miles of range before it degrades to the point of becoming unusable.”\
https://www.carfax.com/blog/how-long-does-the-battery-last-in-an-electric-car
According to a survey conducted by the organization Plug In America, the battery pack in the Tesla Model S only loses about 5 percent of its capacity over the first 50,000 miles on the road, on average, and that rate slows down as additional miles are put on the odometer. Tesla reports that in its own controlled testing, the Model S batteries retained 80 percent of their range after running for a simulated 500,000 miles.
Wouldn’t it be in Tesla’s interest to maybe fudge the numbers a tad....aka Volkswagen a couple years back and the fudged safety tests of Volvo?
Perhaps Plug In America and Tesla are not the most objective sources of info on such things.