I can only give you my experience for one half your question.Unfortunately, with the amount of driving I do, I actually need to charge away from home more frequently than almost anyone else. These are not road trips per se. 90% of my driving is for work and even 360 (realistically) miles of range means that I have to charge away from home at least once a week. I often will do it a little more often than once a week for convenience and sanity so I am not constantly calculating my efficiency and driving 68 MPH to guarantee I'll have enough juice to get home at night. But, your point is well taken. I charge at home as much as possible even though it frequently means charging to 100% the night before a long day.
As I'm typing that, I just started to wonder about something. They say don't charge to 100% unless necessary. They (yes, those same people) also say don't DCFC more than necessary. Does anyone actually know which one of those two evils is the lesser? Hmmm....
I've had my AGT for 15 months now and I have exclusively used DCFC as I do not have access to anything else. 99.5% of that has been on EA (150/350) chargers. I almost always charge to 80-85% other than road trips when I'll occasionally go to 90-95%. I charge, on average, non-road trip wise, every 1-2 weeks.
My max range hasn't dropped more than about 2 miles, maybe less. (Knock on wood)