I drove an R1S today (factory demo). Like all EVs the acceleration was mind blowing. I believe it can do a pretty good job towing, they told me 9000# (no door sticker as it was a preproduction model), except for the already mentioned problem of range and recharge with the trailer in tow.
It is nice inside, drives really good, great suspension, excellent handling. When you floor the pedal you just can't stop smiling. You just can't describe the feeling of driving at supercar speeds with the whole family and the dogs
Now, I still believe that for most RVers it won't be a good fit. You are paying over $100k for a tow vehicle that will need to recharge every few hours. I would take a Durango or Grand Cherokee Hellcat and tow as much as I want.
But if you can accommodate the range and the price it would make a heck of a tow vehicle!