I did a roadtrip in my 3 from the bay area to Santa Clarita and back in one day (twice now, heh).
I found the 250kW chargers to be a useless party trick. Car had horrible efficiency on the way down; low 40s ambient temps i guess was the reason. Took virtually all 310mi of range to go like 188mi. Rolled in on 25mi left. Car didn't precondition -- maybe due to ambient temps, maybe due to low SoC. So it charged mostly in the 120-130kW range for awhile before slowing into the 80s way faster than I expected.
I don't supercharge much so it was a surprise. Looked up the charge curves while I waited, and it made more sense.
Espresso bar was closed, too early in the morning (7:30ish)
On the way home, tried it again, got there with too MUCH SoC remaining, again, slow charge, no real benefit from v3. At least I got my coffee.
Made it home with like 6mi left.
Lesson learned, now I just use Harris Ranch, it's a much better halfway point for us.