If you are a heavy eShop user, buy a pair of Nintendo Game Vouchers (for $99.98). This effectively makes Sonic Frontiers cost ~$50, which is still high, but you also get a second game (like Zelda: Tears of the Kingdom ).
Sonic Frontiers is an upcoming platformer game developed by Sonic Team and published by Sega. The game marks a significant departure from the traditional Sonic formula, embracing an open-world design that allows players to explore and navigate through vast environments. This new approach promises to deliver a fresh and exciting experience for fans of the series. Sonic Frontiers Switch NSP Free Download