I can see the argument for both sides of the coin.
If it's a new game, it's automatically modern despite the platform.
If it's released for a vintage console, it's automatically in the retro "style."
Additionally, what about new titles of vintage IP? Metroid Dread feels retro because it sticks to the established formula and is primarily 2D (or 2.5D, whatevs). But Mario Odyssey very much feels modern because it reinvents the core mechanics and gameplay.