1. If you like adventure and a road trip, why not?
2. Those reports are about autobahn speeds, for instance trying to stay over 100MPH for long periods. Also, driving really hard on the track. For USA highway driving, no problem. You could cruise along at 70MPH as long as you want as long as there is juice left in the pack.
3. Personally I think they are fairly good in the 2010s already.
4. Depends on who you use. Very rough ballpark: $1000