So this guy has the 3DS at 78.5 million, not counting the 2DS units, which he claims sold 10 million. Meaning that altogether, the 3DS family would have sold 88.5 million units.
Where the hell is this guy getting his data from?

Pancho A. Ovies

Nintendo Switch in Japan (Famitsu): 2018 vs. 2019

PlayStation 4/Xbox One/Nintendo Switch: 2018 vs. 2019