Mario Kart 8 Deluxe has been Nintendo’s golden goose for several years, as it’s the company’s best-selling Switch game of all time and has received various updates over the years, becoming a feature-packed experience. Even with Mario Kart World aiming to usurp its position, Nintendo isn’t done dropping new content into Mario Kart 8 yet, as the game just received a new eight-player split-screen mode out of nowhere on Switch 2. It’s free to download, allows for up to eight players…