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Shigeru Miyamoto, the creator of Mario, has said mobile is unlikely to play a major role in the franchise's future releases.
So far, Nintendo's most iconic character has appeared in three mobile games: Super Mario Run, which grossed $60 million in its first year; Mario Kart Tour, which has made over $300 million since its launch in 2019; and Dr Mario World, which shut down after two years.
source https://www.gamesindustry.biz/miyamoto-mobile-not-the-primary-path-for-future-mario-games