i have snowboarded since the late 90s so i knew how to carve and stuff... i have taken my little snow skate to some pretty gnarly hills and when i got scared i just carved to slow down and saved myself. you actually have a surprising amount of control on these things but if your foot slips off / bad toe/heel drag, it could be really bad news. that hasnt happened to me yet. can be a hard adjustmet to make because on skateboard you often do ride around with your toes + heels hanging off the board and they dont drag but snow skate you cant really do that or you will drag.
1 thing that happens a lot to me at least in snowboarding is a tiny spot of ungroomed pile of snow, or possibly even a kicker someone built that you just cant see coming up will just come up on you (i have bad eyesight so this probably contributes). so this happened to me on snowskate this litlte kicker cmae up on me and i had no time to properly adjust. on a snowboard this would have been a fucking brutal slam. on snowskate i was able to jump off and run out (luckily wasnt going THAT fast but i dont think it would have been too bad going mountain speeds - at least you dont have a 40 pound piece of metal strapped to your feet)
the slams can be pretty bad if you are riding on an Iced Out Skatepark. i tried to just carve up and down on a steep bank once and got pwned. wasnt even going fast. if you build a little setup out in the woods into deep ass powder though the slams aint shit and you can try a flip trick off a launch ramp all day. thats mostly what i am doing this year. i really love doing a wallride on these things it is a sick feeling. so much unexplored stuff, havent really seen anyone do any tranny tricks on these yet.