@brute @Zippy6 Correct, remakes like OoT 3D & TP HD are considered separate from their originals.
As far as the end of Switch's life, I voted for 61, with the additions being as followed:
Mario Maker 2
Bowser's Fury
Mario Party Superstars
BDSP
Legends
Splatoon 3
BOTW 2
Pokemon Gen 9
Pokemon Let's Go, Johto
This would give the Switch 21 games exceeding 10 million sales (out of 61 games). I imagine it would be a similar situation with Switch 2.