There are absolutely other times when I'll get substantially less range, but it's understandably when I'm driving faster of more aggressive, or it's colder outside, or it's primarily uphill, or there's a strong headwind, etc.
There are a lot of different factors that can affect a car's range (regardless if it's an EV or ICE), and it seems like Tesla has decided to show the EPA range on the dashboard because there's no way they could magically know where you're driving if it's not entered in the navigation system. Once you start navigation however, it's able to factor in all these externalities and give a very accurate estimate. On the first leg of the above trip, I arrived to charge within 3% of Tesla's estimate.