Ski doos trailing arm suspension was copied from Polaris. Polaris enjoyed many years of success with it. Yamaha also copied it for years. Polaris sued and got Ski doos push button reverse. Nothing wrong with trailing arm suspension. I'd race a modern sled through the twisties with one any day.
They need to take them weather models toss them out a window stick their head out same window. Tell us if it's snowing err not and see if it looks like it might.
Remember weather models predicted the global warming nonsense.