The concept would be more like following bicycle routes used by road bikes, not mountain bikes. The sales pitch is that the X2 can traverse hills, rocky paths, grass, and roads. I am interested in verifying the sales pitch! Other problems would be the 20 km range on a charge (probably the maximum range for a 160 pound rider on level terrain), entrance to albergues (since one would not be on foot or a self-powered bicycle), and the speed of recharging (and cost) in bars and hostals.
Still, it is an interesting thought for aging knees and ankles ...