you have no control, basically to much speed you loose control, to little you stuck, I need do it. fuel was almost out and it was 4km from home, drive around can take 10-15km
Avtually I have done it 2 times, once when it 2m wide water way ice brake, I hit a gas max as I could and all went good. Other in late spring 3 years ago cross a lake, ice was think but damn warm and water was 30cm, damn its hard
Difference is jet ski wont move single centimeter on ice, snow mobile can drive on the water. Many has test and it can drive 300km untill fuel is over. Lads in Norway did it.