I started to ski after 50. Starting snowboarding in 1983. Perfectly happy snowboarding for 35 years, then tore a hamstring snowboarding just after my 51st birthday. Didn't want to cancel a Whistler trip but snowboarding hurt too much so decided to try skiing.
It was hard for a couple of days, then easy to get better, then kind of leveled off, then got much better. It's been great fun learning something new in middle-age. Although so much from snowboarding translates that it's not exactly new.
54 now and I have 100+ days in, still snowboard occasionally but skiing is a more dignified way to grow old, built in walking sticks and you never have to sit down on the snow.
I thought I'd miss snowboarding powder, but no, skiing powder is as much fun and a new challenge. The part of snowboarding I miss it carving. There's a special feeling laying your whole body through two legs onto one edge railing through the snow. It's like how carving skis feels but heightened in a way that's hard to explain.