On the dashboard of my Xbox One, I see a lot of fantastic games that I can't play on other current consoles. Who cares if it is a One, 360 or OG game ? They are all fantastic games, Panzer Dragoon Orta is one of my favorite games ever. Guardian Heroes, Radiant Silvergun and Ikaruga are all gems. Catherine is also a real gem, and I have been able to play it on Xbox One for quite some time now, but not on any other current system. I can also play Jet Set Radio, another game I love. Ninja Gaiden Black etc...
What else can I say ? A great game is a great game. These older games run like a dream on Xbox One, and I can't play them on Switch or PS4.
If my Switch was actually backward compatible with my Wii U games, maybe I would be using it more. But in the current state, because I have to plug my Wii U to play them, I don't play on Wii U nor on Switch.