I wrote a Google Script to pull data from my MS (75D) every hour (using the API) and dump it into a Google Sheet. Of course that makes charting really simple. Finally got around to playing with the data and thought it was mildly interesting, enough so to share. Takeaways: max range does gradually decline over time, and average efficiency (in Wh/mi) is north of 300 which makes it hard to achieve rated range (which I believe is calculated at 280 Wh/mi) I think if I knew these things at purchase I would have gone with the 100D as I semi-frequently make a ~220mi trip which can get dicey given the above. NB: I usually charge to 70% which you can see in the top-left chart.