With the introuduction of cloud saves and automatic saves, how will you handle Mr. Resetti’s interventions?
HN : New Horizons will not be compatible with cloud backups to avoid manipulating time, which remains one of the founding concepts of the series.
English source: Director Aya Kyogoku and Producer Higashi Nogami Reveal New Details Regarding Animal Crossing: New Horizons, including Amiibo Support. - Miketendo64! By Gamers, For Gamers
Original source: Preview - Animal Crossing New Horizons : "Nous ne voulions pas précipiter les choses"