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Much of my reading seems to indicate that we should be charging to 80% to maximize long-term battery life. I don't know if that has changed with the Model 3. The reason for the question is that the "Trip" indicator on the charging slider is 90%. There is still room to go to 100% and I get that I should avoid that if at all possible.
I would think that I should be trusting Tesla and be comfortable charging to 90%, but I'm looking for confirmation. Most of our driving is longer distances and the 90% would make a difference, but wouldn't be critical. Going to 80% might have me return up at less then 20% (when the indicator is orange).