Minus the 3DS bit, this describes me perfectly.
I have 3D World, Captain Toad, Tropical Freeze, Rayman, plus more Wii U games to complete / actually start. Then there's games like SSB4 / Mario Kart that i've put very little time into. Then there's all the VC / eshop games.
I could probably go through to 2020 before completing my backlog, and even then theres Wii games I never finished, and before that GC games.
I will never catch up, although that won't stop me getting an NX as soon as there's something I want to play. Splatoon 2