Artsci,
I am much more concerned that your range is so low. That's an awfully big loss. Have you queried Tesla on this? My P85+ gets 232 at 90%. 236 when new.
Talked to my SC about this. It's far more likely that the algorithm is giving low ball estimates than I'm experiencing a range loss. Evidently over time the algorithm gets worse at estimating range. We have to remember that we're in territory here with no history. It's being invented as we go.
On my drive to CA and back in July my range improved each day as I did max charges and drained the battery to 10-15 percent between superchargers. That's the algorithm and nothing else.