GN notes that Ubisoft has encountered difficulties having Steep run on Switch. Development continues however, and Nintendo is apparently lending its assistance, including the game's online features. One of IGN's sources does caution that it can't promise a release on Switch.
http://nintendoeverything.com/rumor-ubisoft-having-some-trouble-bringing-steep-to-switch/
IGN France source: http://fr.ign.com/steep-switch/26945/news/steep-en-difficulte-sur-nintendo-switch
http://nintendoeverything.com/rumor-ubisoft-having-some-trouble-bringing-steep-to-switch/
IGN France source: http://fr.ign.com/steep-switch/26945/news/steep-en-difficulte-sur-nintendo-switch