2023 is my personal favorite year for the switch. mario wonder, tears of the kingdom, fire emblem engage, pikmin 4, super mario rpg remake, metroid prime remastered, etc is just such a stacked lineup for being late in the switch's life
2017 definitely was a banger, new console, three big games. The Switch is a solid platform with tons of games. 2023 was big for Zelda and even this year is a surprise. I think the Switch still has a lot of time to shine before it’s successor and Nintendo know this. Sure, many people want the new console but I believe there are just as many, if not more, who are still very happy with the Switch and still growing library… another new top down Zelda as Zelda, returns of fan classics, etc…
it really depends on what games you like, like this year may not be the best to someone hoping for a kirby game, but may be the best year for someone wanting mario rpgs to come back. if someone is feeling nostalgic they could say 2017 or 18 was the best year, we got so many classics those years that still hold up today!