OK everyone -- the jury should no longer be out on this topic...
Does regular use of Extended Charge really hurt the traction battery?
I have about 70K on a 2014 and I don't think it does. I do try to run the battery as low as possible (I don't put it on charge every time I pull in the driveway). And I charge on 40A mode when I do plug in.
I seem to still be able to get over 100 miles all the time and I drive heavy footed.
Pacific Palisades, CA
2014 Blue #3040