The tougher conditions you ride in, the tougher you become mentally as you fight the cold and have to mentally dig deep to keep riding.
The slippy conditions make you better at reading the trail and anticipating where you can find grip. They improve your balance when your back, or god forbid front, end slips out and you have to catch it. You become much more skillful on the bike.
You need to be aware of the risks and plan your ride accordingly. Layer up. Take extra food. Don’t stray too far from civilisation. Have the right tyres fitted << very important. But as long as you look after yourself a ride in the snow is GREAT FUN.
I’m a big believer in it!