Its impossible to sell 80 million in 5 years. Ps4 might just do that but not the switch. And i doubt it can even sell 80 million lifetime. My guess is 50 million
Wii U + 3DS managed it, and that was with the Wii U holding it back.
...to avoid getting banned for inactivity, I may have to resort to comments that are of a lower overall quality and or beneath my moral standards.