I still play my 3DS, Wii U, and Vita. I have kept my PS3 since it's the only system that plays Metal Gear Solid 4 (very strange that it never ported). As for my 3DS, I have games likes Persona Q, Radiant Historia, Bowser's Inside story, and a bunch of DS games that I still haven't played. With my Vita I still need to play Danganronpa 3, Virtue's Last Reward, and Zero Time Dilemma. And plenty of others with that. And then there's my Wii U.. I only recently played and finished Legend of Zelda Twilight Princess HD. Great game, but not my favorite Zelda.. and then there's Tokyo Mirage Sessions. Played some of that this year, but didn't finish it yet. I think I'll stick with this one and not get the Switch version, since there are very little differences between the two.
So how about you, SW? What last gen systems do you still play?