While the idle draw is relatively high on Teslas compared to other EVs (even without sentry mode enabled), 7.5% is quite high. I track my stats with Teslamate and it estimates typical SoC loss of 1% over a day.
What I have seen is that the BMS may update its SoC estimate after driving, and I've seen it adjust the estimated SoC up or down by as much as 5% in some cases.
I get that from a planning perspective, it still stinks to have range than you thought you did an hour ago, but it's not all that different from the variation you might get with an analog dial on the gas tank, just that it's much easier to notice and track when it's digital and showed as a precise number.
What I have seen is that the BMS may update its SoC estimate after driving, and I've seen it adjust the estimated SoC up or down by as much as 5% in some cases.
I get that from a planning perspective, it still stinks to have range than you thought you did an hour ago, but it's not all that different from the variation you might get with an analog dial on the gas tank, just that it's much easier to notice and track when it's digital and showed as a precise number.