Being able to leave at 100% makes a huge difference to a curve-challenged MS on a long drive, and it's why destination charging is such a huge bonus for the next leg or a return trip. I've started gifting HPWC's to distant friends that don't have EVs for future trips.
Another factor on long trips is how far a given Supercharger is from the highway. Even if it's a half-mile away, if it's left turns in strip mall hell it can take 15-20 minutes just to get there(I'm looking at you, Rossford OH). Exiting and starting a charge in under a minute at a tollway oasis, though, is a different story- if I'm alone and it's that easy, I don't mind stopping every 30-45 minutes or so and repeatedly charging for 6-8 minutes from 1-25% to keep the rate above 100kW.