How many major exclusives does the Switch need to gain out each year to maintain popularity?

[TallSilhouette]

Two ~flagships per year with smaller/more niche games to supplement is good for any of the big 3. The Switch absolutely has that for their launch year with BotW and Odyssey but I wonder if they can maintain momentum throughout the years. They've been known to have major drought years in the past but maybe with all their studios and contracts consolidating onto one console that will be less of an issue.