The only problem for the S60 is once the battery degrades enough, you are really going to miss the range to make it to the next supercharging station.
Here are some numbers:
100% - 208 miles
95% - 197.6 miles
90% - 187.2 miles
85% - 176.8 miles
80% - 166.4 miles
So my point is around 80% capacity, you might not make it to the next charging station if they are spaced more than 170 miles between each other. I know that supercharging station are planned to be only 100 miles from each other, but just know you cannot venture too far away from one. And we all know Tesla are placing them in 100 miles radius not really 100 miles driving distance.
This is one of the reason why I will only get the 85 if I really want this car to replace my current ICE car