When the road is clear, just try an emergency stop. The i3 stops quite well. Edmunds tested one and it stopped in 109 feet from 60mph...lots of cars take a lot further. You may not like the pedal feel, but that doesn't account for the fact that the car CAN stop. Just like on any car, if the surface is less than ideal (sandy, oily, gravel, water, ice, snow), the ABS system will not allow the tires to slip (much), and your stopping distance will increase, but it will still allow steering and keep you pointed where you want. In most cases, though, the ABS will stop shorter than you can. THe exceptions are when if the tires were locked up, they dug a furrow, pushing a pile ahead of them. The ABS won't allow that to happen.
2011 535i x-drive GT, 2014 i3 BEV