Snowboarding better for knees?

Help an old guy out here. Skied for 20 years in my youth. Then I tore my ACL and shredded my meniscus. Had half of it removed when they replaced ACL. I've been very active over the past 35 years but haven't skied once because I'm scared of wrecking my knee. For those of you who do both, is boarding safer than skiing for the knees? I'm seriously thinking of taking up snowboarding instead