I was looking through my Switch backlog and it's actually really small. Usually my system backlogs by like year 2+ are hopeless with like 50-500 games that I'll never get through. But maybe my 2021 gaming goal will be to clear out my Switch backlog. The only games I haven't played are Astral Chain, Monster World, Luigi's Mansion 3, Megaman 11, Octopath Traveler, Mario Rabbids tactics and Curse of the Moon 2. And those are all pretty much good games and outside Octopath, nothing too long.
Since I don't think there's anything announced so far for 2021 on Switch that I'm interested in playing besides Bayonetta 3 if it ever comes out, or if BoTW2 is 2021 or another mainline Mario, that all seems pretty doable to get through in a year of Switch playing.
There's also a a whole bunch of backlog Wii U ports that I never got around to playing on Wii U and are on Switch like NSMB U/Tropical Freeze/Pikman 3/FE#Mirage Sessions, but I'm not going to count them.