So Matt lost around only 2% of the total battery capacity after completing his first 50k miles, as he mentioned in the video the first 50k miles battery degradation is the biggest hit, afterward the drop in lost capacity is consistently low — as we saw in the table above, it takes around 3.7 years for an average person to drive 50,000 miles that means Tesla’s 100k – 120k warranty covers 6-8 years for a normal driving pattern.

The best a Tesla owner can do from his side for gaining the max life out his car’s battery is to maintain an optimal State of Charge (SoC) that eventually falls in between 80% to 20% in a daily routine, occasionally going up to 90%+ or below 5% is not bad for the health of the batteries as Elon Musk suggests:

Not worth going below 80% imo. Even 90% is still fine. Also, no issue going to 5% or lower SoC. — Elon Musk (@elonmusk) December 1, 2018

Teslanomics has done some substantial research in Tesla battery degradation using data from 2600+ vehicles which include Tesla Model S, 3 and X, looking at the graph it is clear that most of the Tesla vehicles retain above 90% battery capactiy after 100k miles, some of the cars (small blue circles in the graph) showing early degradation, most probably have a software bug or need to recalibrate the battery.

Recalibrating sometimes is simply done by depleting the battery to a 10-20% SoC and then re-charging it and sometimes the car needs to be taken to the Tesla Service Center for expert assistance, as happened in the case of a Tesla Model 3 Performance owner (full story below on how he got this issue fixed).