Wii/DS each had ten 10-million-plus sellers. Switch has five and it's not even 2 years old

[Slownenberg]

Switch will probably end up with 20 ten million sellers.

It's already got 11. Luigi's Mansion and SM3DW will both hit it this year. That's 13. Too bad they didn't leave 3D All Stars out until end of year as it fell just short.
MH:Rise will hit it. That's 14.
The Pokemon D/P remake and the Pokemon Legends game will both hit it. BotW2 will obviously. That's 17.
Splatoon 3 has a good chance of hitting it. That's 18.
Eventually they'll no doubt release a brand new 2D Mario game. That'll be 19.
Lots more options for just one more game to get there: maybe Pokemon Snap does it?? Another 3D Mario?? Another Ring Fit?? Another Mario Party obviously would. Also definitely the possibility that Mario Maker 2 slowly creeps up to 10 million.

Could very well see as many as 25 ten million sellers when it's all said and done.